Theme periodically pings selected computer. It is done each 15 minutes (.theme file, line 2, interval in milisecs). Here, as you can see, my theme benefits from program "ping" (.theme file, last line). So you can specifity computer you want to ping by any way which ping understands. Theme also benefits from programs "grep", "awk", and "date". Last one i have mentioned is used on line 12 in .theme file. There, you can change format of time displayed.
Theme's look is made to fit "Ricardo's kiramba debian" theme, which you can get at http://www.kde-look.org/content/show.php?content=30686.
Remember you must have programs mentioned above.