Yep its finally released!! According to my sources a beta is due (possibly) sometime this summer. Anyway here are the links.
Blog:
XNA Game Studio 3.0 CTP
Download:
XNA Game Studio 3.0- Microsoft Download Link
It does not yet support 64 Bit or Xbox 360, but still its only a CTP release!!
And one bug mentioned so far has been that spritebatch seems to only work with certain image file types and certain sizes, more info on bugs and such to come. We all need to do our part to make it a better framework