I agree, this discussion makes a bit more sense here than over at t4r.org.
So far, I haven't had any more USB problems. The Lilliput flickering issue is substantially better than before but still not gone all together. The flickering goes away when I disconnect the Audigy so perhaps there is some kind of interference going on between the two -- dunno.
My screen doesn't seem to ever get hot -- like others have reported with theirs. Also, since it's mounted right between two ventillation ducts, it should pick up a bit of cooling from the air flowing through those (and whatever happens to leak out at the joints inside the dash). I don't think a fan is needed in there. If you did put one in there, where would it vent? It would probably be easier to poke a small hole in the vent ducts to direct air in, if you really want.