There are a couple excellent guys who have blogs here that do some great work in the more darker, muted Marines. Quite a few guys painting Raptors too.
Rob451 has probably one of the most badass Raptor forces I've seen.
Check it out.
I've had my Marines on hold while I've been playing Infinity. Actually sold a bunch too. But I still have a ton of bitz and cool models sitting around, and I'm going to start kitbashing some stuff soon. Not enough to make a full force, but to maybe play with some Inquisimunda ideas, and for little projects like the
GMS.