[manasecret]

While lack of ventilation is never good, mine has been stuffed into a closed shelf about the same size for the last year and a half, but with all the Wii games and old Gamecube games all stuffed on top of it and around it. I mean it's literally stuffed in there with no room around it in any direction.

The shelf does however have a large opening out the back, and I don't play the Wii that often. And it did freeze a couple times when I played Tiger Woods 10. If yours isn't blocked in all directions, and you have openings out the back, you're probably fine.