It's kind of hushed while all the vendors get it in stock. But most vendors have it and are shipping it now. I have not seen a revision list. But have heard there is more support for many other PIC USB chips. I had asked a few months ago about support for the PIC18F26j50 family, and I got an email from Jeff at MeLabs that the PIC18F26j50 is now supported by v 2.60. (My v2.60 should get here tomorrow!).