Hold off on buying that thing. It's actually just a black Dingoo A320, which is a chinese handheld with emulators preloaded. There are huge problems with it right now, but the user community is kinda growing, so it might turn out okay. Not the moment to buy it yet though.
SNES emulation is pretty awful for starters and "pressing Y and B at the same time doesn't work, we call this a feature"
So yeah, some great guy is porting Linux and it promises to be excellent to fix the awful standard emulators and such, but it's still miles away. Right now he's got the kernel loading and if you're a decent linux guy, you can get some games ported on it already, but it's going to take a while to get it working on all the different hardware versions.
I'm rambling. Point is, it's not good... yet.
I'm going to buy one though, once it matures a bit and still exists.