I had not read anything about them just ran across it yesterday.
Yeah the on board crypto that is crazy but all the other stuff looks really neat.
From reading some of the press releases it does not seem like it is that complicated.
The ATMEGA64(100TQFP) is about $7.33 per 100
The Xmega64(100TQFP) is about 3.75 per 10k, I am guessing that the prices are almost the same, probably made in the same fab.
Only the large pin packages are available right now but it would be cool to take a look at one of the Xmega64 in the 44TQFP.
These chips have the same AVR core so it will be interesting to see if these can be applied to the non-industrial community.