Just go to the poker site reviews or bonuses tabs at the top of the page to find site links, offers.
Carbon only has ~3k ppl onsite on average but its pretty soft, has a good selection of games. Hope it keeps growing because I like it, just not enough action yet.
[forgot to mention, need to have 65 posts and join freeroll club to play, the thursday buyin is open to members with 15+ posts]
Carbon Poker is a site, I think, mainly for cash game play.Their tournament structure is way to fast. This is true even for, some of, the high buy-in events.