All the bitcoin sites are using the same software. I might start up my own poker room at http://blackout.com
and better promote it but currently I'm playing at btcontilt there's a refferal code in my sig I have no idea what it does.
sealswithclubs is always absolutely dead I never see a soul there.. btcontilt is better but it boils down to about the same 10 to 20 regulars.... a good poker site needs to spend some money on advertising and coop with a site like https://www.exchangebitcoins.com
so that the novice can get chips easy and fast.
Currently in the U.S. the fastest way is to deposit cash into exchB then you can have your bitcoins within an hour (they are very fast) but then there is a delay on the poker site.. sometime bctontilt can be very slow and this is annoying. When I send bitcoins on want them there on 1 confirmation when I withdraw I want them when I withdraw I don't want to wait for some kid running the site to check his e-mail and do it. This is no good.
The issue here is twofold - texas hold em is geeky but main stream, but bitcoin is extremely geeky and non 'fish' average joe friendly - so people who are playing for real btc at the tables are all technophiles of some sort and that eliminates a huge influx of regular players (where profit comes)