Cat, I did this in PM. I got Sam, kylezarmy, Arch, Squirrel and Brandon to reply. Also Pedro is in the US and recently just started playing again (And me of course)
I think the complete list is...
Sam
Kyle
Archie
Squirrel
Brandon
Brad
Pedro
Mellow
I don't think Jordan is still in the posse, he couldn't ever sign up for the site and i haven't seen him on in a long time. Don't think he got his new copy of RDR yet.