The list is straight out of the Microcontroller Product Selector (MPS).
http://www.microchip.com/productsele...tSelector.html

Select 8-bit Architecture, move the left Flash slider to 64, then click USB.

I believe 2.60B will be released in January.
Normally they wait till there have been several issues fixed, but there haven't been any in 2.60A.
So Charles has been talking about releasing it because there's so many new chips.

There are several things to think about regarding 3V/5V.
But that topic is beyond the scope of N-Bit_Math, so you should probably create a new thread for it.