This computer was a real steal at Wal-Mart in the third quarter of 2006.
ndiswrapper and wait for an Ubuntu release that includes a newer MadWifi package, or you can update madwifi yourself.
glxgears runs very poorly.
To fix this, Download the driver from ATI.
The current version as I'm writing this is 8.32.5, released 13 December 2006.
Don't forget to compile and install the fglrx kernel module.
The installer places the source in /lib/modules/fglrx.
$Id: a105-s2101.html,v 1.2 2007/01/25 21:08:50 robert Exp $