According to Cyanworlds, they're going to release the game with a free "visitor" mode. Anyone and everyone can access the game for free, but will be restricted to a few areas unless you pay for a GameTap subscription. (...and you will be able to join Uru Live regardless of the fact that GameTap isn't available outside the United States. They are planning to make Uru Live accessable worldwide.) So the client itself will be free, and you can check it out without committing to a subscription.