I know there was a 40k thread on SSO but I believe there was also one on here...?
Off-hand, I know myself, Vegetta and Daemoniac all play.
I've got a really modest Dark Angels/Deathwing army, but haven't done a lotta work on it lately.
I wish I could get some more picture of my brother in law's stuff. He's got a RIDICULOUS large Eldar army (every current production Eldar figure, plus every Forge World tank/transport and more), every piece of GW terrain, buildings, etc. Plus a sizable Dark Eldar, Chaos and Tyranid army.