This thread is REALLY funny, in that, WotC has already (as in, they are in stores right now!) TWO (count them, two) D&D board games out.
The other funny thing is that they are great. They've received high marks from basically everyone. I was just at the PAX East con this last weekend, and the lines to "learn to play" the board games were full the whole weekend. There were constantly tables in the massive "Table Top" section with people playing these game. Every "game store" vendor booth had the games, and they were selling like hot cakes.
So in reality, D&D as a board game is already here.
They've already announced that the Drizzt game is going to be Compatible with the Ravenloft and Wrath games. I imagine much like Wrath, it'll have the "standard" rules/mechanics and just add new hero choices, new monsters/traps/encounters, and maybe an additional mechanic (like the doors and treasure rooms that Wrath added).
I suggest you head down to your local game store, ask for a demo of the game, and then have fun. (or just flat out buy it).