I have known about it for ages man. I am going to get one soon, you can buy custom cases for it and stuff. I'm going to get one, and upgrade the hardware on it as best as I can and make it a tiny gaming computer. XD
It is so cute. I bought one for my friend and he uses it as a gaming server. (And an FTP server.)
Also, you actually care about Linux? This is great news!
RISC OS was recently ported to it, so you can turn it into a super-powered retro machine if you want to.
IMO hold off buying one for the moment though, a new version is due out soon.
Just remember that stuff has to be made to run on ARM, so the majority of *nix stuff wont work on it unless someone feels like porting.