I recently found SealsWithClubs, an online poker site that uses Bitcoin and allows U.S. players to play. If you've been jonesing to play online poker and you have, or can get, some Bitcoins, SealsWithClubs is it. They have a Mac client, as well as a browser-based client, Windows, Linux, and Android. Bets on the site are in denominations of 1 "Chip," with a Chip being equal to 0.001BTC, or 1/1000th of a Bitcoin. There are plenty of game withs blinds smaller than a Chip, going down to 0.05/0.10 Chips, which is roughly similar to nickle/dime blinds. I'll offer a more detailed review of the site next week.
Check It Out: SealsWithClubs Offers Online Poker to U.S. Players Through Bitcoin