I picked up a very cheap and elderly low-profile nvidia AGP card for my cheap amd elderly Dell GX270:
root@ilium/home/andrew# lspci | grep nVidia
01:00.0 VGA compatible controller: nVidia Corporation NV18 [GeForce4 MX 4000] (rev c1)
I picked up immediate 2D benefits from the nv driver so I also picked up the slackbuilds.org legacy driver and tested it on my 'testing' partition. I was pleasantly surprised to see very little difference in 2d performance and not exactly mind-blowing 3D, but I guess this is the nature of this fairly pedestrian card.
Am I alone in finding the nv driver perfectly acceptable for 2D performance? BTW the computer cost about $280 second hand and the card was $25 both from eBay: great what you can scavenge from people's discards :-).