[LAU] small devices for midi?

hey everyone! long, uninteresting back story: I've recently changed my residence, and have very limited space. my roland piano (rd-700sx) has extremely limited space on the front panel. it would be great/neat/fun to have a very small device that I could set on my roland that I could sequence on. some hardware options: yamaha qy100 - very small and cheap! yamaha rm1x - very capable, expensive? others? now, maybe these hardware options aren't very interesting to linux geeks, so I got to thinking that maybe, just maybe, there is a small device that supports linux that supports alsa/midi? pandora? gp32x? beagleboard? something else? of all of these options, the pandora looks *amazing*, but from what I've read you can't really get your hands on it. so how about it everyone? any recommendations? thanks list, I always appreciate your help! josh