Trackmania Nations Forever (Free)
If you're interested in what promises to be a fun multiplayer game, check this out.
It's free, but not the illegal variety of free.
Haven't tested it myself yet, but the old one was pretty good.
Who knows, maybe a UCP event might be on the cards some time...
[URL="http://www.tm-united.com/eng/index.php?lang=en&rub=nations"]
Trackmania Nations Forever[/URL]
EDIT: Gotta add that if you're a hard-core simulations bunny who hates arcade-style racing, don't bother. This is strictly light-hearted fun.