I've used Kali from the UK on a 33.6 connect. It's passable as long as
you get players with pings under 400 to play against, and the cars do
still warp quite a lot, but it's certainly fun. F1RS, Nascar 2, TOCA
(which supports TCP/IP anyway) and Ultimate Race Pro are sims that
definately work with Kali though F1RS is the only one I've played. The
URL for Kali is www.kali.net and it costs $20 for lifetime registration.
There is a newsgroup for Kali users- alt.games.kali
The 'Where To Race' server, channel #f1rs is where you'll find the F1RS
hotshoes.
Too many answers? :)
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Spudgun