Hi Bohne,
i would support you to port arduino on that micro ... my idea is to use that micro for the next version of Multipilot Board.
Actualy we are 3 developer that are working on that project ... we will start to design hardware in the next week . We have yet update arduino sanguino to Multipilot and upgrade Crystal from 16 Mhz to 20 Mhz.
http://code.google.com/p/lnmultipilot10/
I don't know if this is correct area of Forum for this thread ?!
Regards
Roberto