Ok, I searched and searched, and didn't find this here and I can't believe it.
Disney has released an underwater photo of one of the AA divers, which Darkbeer is hosting on his smugmug. I couldn't find it discussed here
Here's the shot!
Photo hosting by Darkbeer. Check out his smugmug for all the info http://darkbeer.smugmug.com/gallery/2870200#154056708
Other discussions have zoomed in and noticed the writing on the back of the diver's mask, just like the writing on the mask from the movie for the dentist.
Plus, JiminyCricketFan in his thread has great photos as well from another 'human' AA/figure from the lagoon as well! http://www.micechat.com/forums/showthread.php?t=64927
This is great news IMO as this appears the ride is going to put a spin on the movie, rather then just an abridged version of the movie.