Yes, Blur came out on PC. I second this recommendation, and of the two Wipeout games mentioned, I favor Pure over Pulse, FWIW.
Is there a distinction between Mario Kart clones and vehicular combat games? If so, maybe this doesn't qualify, but I like Firebugs for the PSX.
There's a couple Wipeout-ish games in beta on Steam (the last I checked) that look promising. Ballistic NG and Slipstream GX.