Appears there is an Iron Chef America video game on the brink of release by the company Destineer Studios. It was recently listed on Gamestop's website for DS and Wii formats, and then it was pulled.
Hopefully, it will be released soon.
Couple of interesting points.
1) In the video(shown below) the voiceover is not Alton Brown.
Perhaps he's in the actual game, though. If not, well, there goes my sale.
2) The newest Iron Chef, Michael Symon is included.
3) The video shown is a commercial for Food Network - I haven't seen it air yet, but good to see they are getting their money's worth.
Video trailer (if my embed ever fails)and additional information can be found here.
Hmm, to Wii or DS...
That is the question.