NWVault has a few movies up of the Neverwinter Nights expansion pack, Hordes of the Underdark - including footage of a Gelatinous Cube and footage of the Dragon Disciple. Both movies are 150MB, and were taken from a Korean D&D conference where the game was presented. Smaller ones are also available if you just check out their front page and scroll down.

I've always liked slimes in D&D. They're scary things.

Spotted this at Blue's News.