I have already told you that i am interested in embedded computer world. So no-one will be surprised if i want to speak about some nice arm-based-linux-board!
Now this the nicest one:
and hereby below a list of interesting boards:
And now the most free (as in speech not in beer):
They told that olexino is completely open source. Both software and hardware. And in https://github.com/OLIMEX/OLINUXINO you will find every thing.