Here's a link to a good site with some high quality camera housings. Depending on what camera you're using they range from $300 on up to $1300. There are some cheaper products out there, but the good thing about these are that they have the glass "cap" that screws onto your lens so it stays in good position and there is no "fogging".
As for new ways to tape, we're working on a "fiber-optic" set-up with the small camera mounted on the end of a stick connected to the remote recorder. This is how they got alot of the shots in Free 4 All, very cool stuff.
NumbSkull Productions www.numbskullpro.com