I have not tested the vesa mounting yet, but as you can see on the mp3car description its mounted with the four holes at the corners of the case. All the photos i've seen of the habey mounted are on a computer monitor, not a wall-mounted television.
i've had some hands-on experience with that mainboard (not in the Artigo case) and it's very surprising how well it does. VIA is obviously way behind the bandwagon with the release (the Atom + Ion have been kicking *** for awhile now already!) but they did come out with a killer pair here.
Plus, it's the only Pico-ITX form factor that packs such a punch right now.
edit: woops @ the language. dually noted