Roadmap indicates:
"Radical Changes in the game world" in August
"Version 2.0 Software Distribution" on October
"PS3 Beta Test" on what I wildly guess is the second week of november

I'd set PC beta on October, however I do not remember wether they mentioned if the PC beta was coming before the PS3 one but supposedly they will both be running together at some point.

So more like 3 months, yes