I have been following the Raspberry Pi project.
I wouldn't use it for the master board, it would only be possible to use it for display purposes, logging, connectivity etc. which means one level higher.
sudo bmsmaster --restart --force anyone?
BTW, the availability is not there yet - there are a lot of unhappy people who did get one and have to wait 58 days plus to get one each...
I'd prefer ATMEL or PIC, maybe an Arduino that you can interface to with whatever you want.
This is just my opinion, of course - what do you think?