They sure do. I used an S3 Virge back in the day, and it supported both 2D and XVideo. Ditto Trident Cyberblade (which actually was supported far better in Linux than in Windows). These cards may be old but they aren't THAT old. By the time I started using Linux in 1993 or 1994, I had an (unaccelerated) Oak OTI-067 but companies were already in full swing trying to make their cards as fast as possible (mainly for use with Windows 3.1 or OS/2, but XFree86 was supporting these as well.)do these drivers supply any form of hardware acceleration, or are they pretty much just there so you can configure additional screens with xorg.conf and a full color spectrum?
These cards are not "crippled". They can do everything they were designed to do, and still can. Crippled is when you can't use all features (any longer) because the drivers would not let you. Like if you had to use the vesa driver because the specific driver died. Or if there was no Linux driver for your new, expensive card.
cl333r, who are you to judge anyone doing some constructive work? Even if a developer were the only user of a card he is very much welcome to fix the driver for himself and push the fix upstream.