You should check out the Angry Marines. I’m tempted to start playing just to field a chapter. (Language warning.)
I don’t actually play, but I love the fluff. If you’re curious, there are some very good webcomics based on the game:
Turn Signals on a Land Raider: http://tsoalr.com/?p=1
Servants of the Imperium: http://servantsoftheimperium.com/comic.php?comicid=1
Exterminatus Now (A WH40K/Sonic the Hedgehog mash-up. Yes, you read that right): http://exterminatusnow.co.uk/2003-09-29/comic/meet-the-crew/dirty-harry/
That first link was Trojan Central Station LOL....haven’t played that game since senior year myself (90/91) but it was my obsession for a while.
Vagina won that contest by a mile.