According to one website, the 2009 Food and Wine festival will be on from September 28th to November 15th.
My family and I went to the F&W festival last year. It was a lot of fun! My family and I tried dishes from many food booths. It took care of lunch and dinner!

Before you go, I recommend that you check out the 2009 food booth list. You can find it here on wdwinfo.com and on allears.net. If you can, try to go on a weekday instead of a weekend. It'll be less crowded.