I think i saw an article one time on anandtech or something. :P I found that article and your fps sounds about right. http://www.anandtech.com/video/showdoc.aspx?i=2895&p=4
There is a new league starting up soon a 4 vs. 4 league. To anyone interest.
Open servers to practice on. Form your own Team, can have up to 8 players on a team. 4 play each match. If interested come check out the league section on www.carball.net . :P
Here is a trailer that shows more. www.carball.net/cb26/video.asp
It is soccer with vehicles. Buggy, Bigwheel, Spectre, and Bullitt , you can download it at www.carball.net/phpBB2/viewtopic.php?t=2029 , Anyway hope you try it.
Here is a help manual.
Also you need ut2004 to play it, it is a mod for ut2004.