Conky!

Here's my .conkryc

Mine:
# note that the $xmms2_* and $mpd_* stuff will only work if you have support for them built into conky

alignment top_right
double_buffer yes
update_interval 5.0
Maximum_width 200
own_window yes
own_window_type desktop # Try also 'normal' or 'override'

TEXT
$nodename - $sysname $kernel on $machine
$hr
${color grey}Uptime:$color $uptime
${color grey}Frequency (in MHz):$color $freq
${color grey}Frequency (in GHz):$color $freq_g
${color grey}RAM Usage:$color $mem/$memmax - $memperc% ${membar 4}
${color grey}Swap Usage:$color $swap/$swapmax - $swapperc% ${swapbar 4}
${color grey}CPU Usage:$color $cpu% ${cpubar 4}
${color grey}Processes:$color $processes  ${color grey}Running:$color $running_processes
$hr
${color grey}File systems:
 / $color${fs_free /}/${fs_size /} ${fs_bar 6 /}
${color grey}Networking:
 Up:$color ${upspeed eth0} k/s${color grey} - Down:$color ${downspeed eth0} k/s
$hr
#${color grey}MPD: $mpd_status $mpd_artist - $mpd_title from $mpd_album at $mpd_vol
#Bitrate: $mpd_bitrate\n" "Progress: $mpd_bar
#${color grey}XMMS2: $xmms2_status $xmms2_artist - $xmms2_title from $xmms2_album
Progress: $xmms2_bar
${color grey}Name  PID CPU% MEM%
 ${color lightgrey} ${top name 1} ${top pid 1} ${top cpu 1} ${top mem 1}
 ${color lightgrey} ${top name 2} ${top pid 2} ${top cpu 2} ${top mem 2}
 ${color lightgrey} ${top name 3} ${top pid 3} ${top cpu 3} ${top mem 3}
 ${color lightgrey} ${top name 4} ${top pid 4} ${top cpu 4} ${top mem 4}
${tail /var/log/Xorg.0.log 3}";
$hr
${execpi 60 DJS=`date +%_d`; cal | sed s/"\(^\|[^0-9]\)$DJS"'\b'/'\1${color orange}'"$DJS"'$color'/}
# if using the latest conky, replace the last line with:
# ${execpi 60 DJS=`date +%-d`; cal -h | sed s/"\(^\|[^0-9]\)$DJS"'\b'/'\1${color orange}'"$DJS"'$color'/}

Other stuff you could add: 

background yes
use_xft yes
xftfont Sans:size=8
xftalpha 1
update_interval 1.0
total_run_times 0
own_window yes
own_window_transparent yes
own_window_type desktop
own_window_hints undecorated,below,sticky,skip_taskbar,skip_pager
double_buffer yes
minimum_size 200 200
maximum_width 200
draw_shades yes
draw_outline no
draw_borders no
draw_graph_borders yes
default_color white
default_shade_color black
default_outline_color white
alignment top_right
gap_x 12
gap_y 12
no_buffers yes
uppercase no
cpu_avg_samples 2
override_utf8_locale no
TEXT
${font sans-serif:bold:size=8}${color yellow}SYSTEM ${hr 2}$color
$sysname $kernel $alignr $machine
Host:$alignr$nodename
AMD Athlon 64 X2 $alignr${freq_g cpu0}Ghz
Uptime:$alignr$uptime
File System: $alignr${fs_type}
Battery:$alignr${battery}${battery_percent}%
${font sans-serif:bold:size=8}${color yellow}DATE ${hr 2}$color
${alignc 59}${font sans-serif:bold:size=26}${time %H:%M:%S}${font}
${alignc}${font sans-serif:bold:size=8}${Time %A %m %d %Y}
${font sans-serif:bold:size=8}${color yellow}PROCESSORS ${hr 2}$color
CPU1: ${cpu cpu1}% ${cpubar cpu1}
RAM:      ${alignc} $mem / $memmax $alignr $memperc%
SYSTEM: $alignc ${fs_used /} / ${fs_size /} $alignr ${fs_used_perc /}%
SWAP:    $alignc ${swap} / ${swapmax} $alignr ${swapperc}%
${font sans-serif:bold:size=8}${color yellow}TEMPERATURE ${hr 2}$color
PCI adapter Temperature:$alignr${hwmon 1 temp 1} ${iconv_start UTF-8 ISO_8859-1}° ${iconv_stop}C
V. device Temperature:$alignr${acpitemp} ${iconv_start UTF-8 ISO_8859-1}° ${iconv_stop}C
HDA Temperature:$alignr${hddtemp} ${iconv_start UTF-8 ISO_8859-1}° ${iconv_stop}C
${font sans-serif:bold:size=8}${color yellow}TOP PROCESSES ${hr 2}$color
${top_mem name 1}${alignr}${top mem 1} %
${top_mem name 2}${alignr}${top mem 2} %
${top_mem name 3}${alignr}${top mem 3} %
${top_mem name 4}${alignr}${top mem 4} %
${top_mem name 5}${alignr}${top mem 5} %
${font sans-serif:bold:size=8}${color yellow}WEATHER ${hr 2}$color
Update: ${alignr}${weather http://weather.noaa.gov/pub/data/observations/metar/stations/ WMKK last_update - }
Weather: ${alignr}${weather http://weather.noaa.gov/pub/data/observations/metar/stations/ WMKK weather - }
Temperature: ${alignr}${weather http://weather.noaa.gov/pub/data/observations/metar/stations/ WMKK temperature}${iconv_start UTF-8 ISO_8859-1}° ${iconv_stop}C
Cloud: ${alignr}${weather http://weather.noaa.gov/pub/data/observations/metar/stations/ WMKK cloud_cover -}
Humidity: ${alignr}${weather http://weather.noaa.gov/pub/data/observations/metar/stations/ WMKK humidity}%
Preasure: ${alignr}${weather http://weather.noaa.gov/pub/data/observations/metar/stations/ WMKK pressure -}hPa
Wind: ${alignr}${weather http://weather.noaa.gov/pub/data/observations/metar/stations/ WMKK wind_speed}km/h
Wind Direction: ${alignr}${weather http://weather.noaa.gov/pub/data/observations/metar/stations/ WMKK wind_dir}
Wind Direction: ${alignr}${weather http://weather.noaa.gov/pub/data/observations/metar/stations/ WMKK wind_dir_DEG}${iconv_start UTF-8 ISO_8859-1}° ${iconv_stop}
${font sans-serif:bold:size=8}${color yellow}NETWORK ${hr 2}$color${if_existing /proc/net/route wlan0}$
$alignc ....Wireless....
WAN IP:$alignr${execi 3600 wget -O- http://whatismyip.org/ | tail}
IP address: $alignr ${addr wlan0}
ESSID: $alignr ${wireless_essid wlan0}
Connection quality: $alignr ${wireless_link_qual_perc wlan0}%
Downloads:$alignr${downspeed wlan0}/s
${downspeedgraph wlan0 8,200 F57900 FCAF3E}
Total Downloads:$alignr${totaldown wlan0}
Uploads:$alignr${upspeed wlan0}/s
${upspeedgraph wlan0 8,200 F57900 FCAF3E}
Total Uploads:$alignr${totalup wlan0}
${else}${if_existing /proc/net/route eth1}
$alignc ....Wireless....
WAN IP:$alignr${execi 3600 wget -O- http://whatismyip.org/ | tail}
IP address: $alignr ${addr eth1}
ESSID: $alignr ${wireless_essid eth1}
Connection quality: $alignr ${wireless_link_qual_perc eth1}%
Downloads:$alignr${downspeed eth1}/s
${downspeedgraph eth1 8,200 F57900 FCAF3E}
Total Downloads:$alignr$${totaldown eth1}
Uploads:$alignr${upspeed eth1}/s
${upspeedgraph eth1 8,200 F57900 FCAF3E}
Total Uploads:$alignr${totalup eth1}
${else}${if_existing /proc/net/route eth0}
$alignc ....Cable....
WAN IP:$alignr${execi 3600 wget -O- http://whatismyip.org/ | tail}
IP address: $alignr ${addr eth0}
ESSID: $alignr ${wireless_essid eth0}
Connection quality: $alignr ${wireless_link_qual_perc eth0}%
Downloads:$alignr${downspeed eth0}/s
${downspeedgraph eth1 8,200 F57900 FCAF3E}
Total Downloads:$alignr$${totaldown eth0}
Uploads:$alignr${upspeed eth0}/s
${upspeedgraph eth0 8,200 F57900 FCAF3E}
Total Uploads:$alignr${totalup eth0}
${else}${font sans-serif:bold:size=8}${font}Network Unavailable${endif}