DisneyFoodBlog.com is my go-to resource for Food & Wine Festival information. Closer to the festival, it will have all of the menus, special event details, etc.
When we go, we don't go for the special events. Instead, we pick up a passport and take our time strolling World Showcase, stopping at stands with dishes or drinks that piqued our interest.
My No. 1 tip would be to avoid the weekend, if possible. Sometimes that's the only time we can go (we're pseudo-local), and it's much busier than during the week.
Enjoy!