Me likey. Quite a lot, in fact.
However, a little constructive criticism: First, you'll want to be able to plug in GCN controllers. So you could cut a hole in the side (and remove the GCN port flaps). Also, more of an aesthetic problem than a functional problem: The Wii, from disc slot to ports, is longer than the from the GCN ports to the fan side. This is a personal preference, but I intended to make my Wii dock have a laptopish configuration. So I came up with a solution: Flip the Wii 90 degrees (such that the GCN ports would be facing the front).
As you can see in
this image, there are two parts on the side that don't fold open. So you could support it from falling forward by having two sturdy pieces of plastic there. I dunno. I'll have a mockup within a week.