The FBI only blocked five domains.
Any other domain, such as fulltilt.com, fulltiltpoker.co.uk, pokerstars.eu, are still out there and running. You're really not "getting around" the FBI by going to these sites, you are just using an alternate path. That is why companies typically have dozens of domain names purchased well in advance of any commercial activity.
Now, if you are looking to get around the restriction placed on American players by FullTilt or Pokerstars, that's going to be a bit more difficult because the poker clients use SSHv3 or TLS which requires the two endpoints to coordinate the connection with each other. Sure you can proxy or tor through the network, but ultimately, you have to log into their site as yourself.
The only other way around is to tor to a non-US location, sign up as a new user, and transfer your bankroll. Oops, they disabled transfers...
Face it. We're screwed.
Either wait it out, or go hit the play chip tables. Want some real entertainment (fish)? Go play Zynga poker on Facebook...