It's got everything we would need at a reasonable price AFAIK ; not much documentation however. If anyone has done this already, maybe some links/notes/screenshots could be posted?
I haven't really seen any screenshots of Xorg running yet, but it's supposedly in one of the available ROM images. with matchbox/kdrive
EDIT: gumstix was mentioned way back here over two years ago along with the coLibri module which has been upgraded now to the pxa320 @ 806MHz, but doesn't come with OpenEmbedded.
The main thing that's stopping me from buying gumstix I guess is a general distaste for xscale compared to x86... (thinking mini-ITX, 'cause I still haven't gotten one yet)
EDIT2: mini-ITX is too big. (saving to buy a robostix combo)