My little script to check the Raspberry Pi's status over SSH.

stat.sh

#!/bin/bash
let freq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq)/1000

temp=$(vcgencmd measure_temp)
temp=${temp:5}

wifi=$(cat /proc/net/wireless | grep wlan0 | awk {'print $4'} | tr -d .)

read one five fifteen rest < /proc/loadavg

uptime=$(uptime | awk '{print $3}' | tr -d ,)

card=$(df -h | grep -E '^/dev/mmcblk0p2')
used=$(echo $card | awk '{print $3}')
free=$(echo $card | awk '{print $4}')
percent=$(echo $card | awk '{print $5}')

echo "CPU.......: $freq MHz"
echo "Temp......: $temp"
echo "WiFi......: $wifi%"
echo "Load......: $one, $five, $fifteen"
echo "Uptime....: $uptime"
echo "SD card...: $used used ($percent), $free free"
if [[ -n $(pgrep xbmc.bin) ]]; then
    echo -e "XBMC......: \e[00;32mRunning\e[00m"
else
    echo -e "XBMC......: \e[00;31mStopped\e[00m"
fi

Sample screenshot: