I have the Nokia N800 (same specs as the N810 mentioned above), and a Nokia N900 as well. The N800 is still good for everything non-flash, the only problem is that original batteries are not made anymore (and the 3party ones are rubbish, as I\'ve experienced). N900 is totally good. Oh, and a Pandora too - 256MB RAM as well. And yeah, a Beagleboard. And all in all, bigger memory is always better.
I would go for the B if I could, because of the memory. If it was only the Ethernet I wouldn\'t worry much, I have an Apple USB Ethernet stick that works perfectly with every Linux device I\'ve tried it with (Pandora, Beagleboard, laptops, PCs). But the 256MB will make a very useful difference.
Unfortunately the currently known B price will tip it just above the value that triggers all kinds of VAT and customs handling charges when shipped to Norway, so it would _nearly_ double the effective price, from $35 to $66 (if shipped through mail, shipping not included). So I wish the Ethernet wasn\'t included (the Apple USB will do the job just as fine), if the price was two dollars lower all would be good: No Norwegian VAT. Oh Well. But $66 is quite different from $35, not to mention $25 for the A. Painful decision.