Expect an unimaginably fun time! There are food and wine kiosks (also extra beer kiosks) set up in each country around the World Showcase, with samplers of food for about $2.50-$4.00, and small glasses of wine for about $4.00-$7.00.
There are tons of food seminars, wine tastings, special dinners, etc. throughout the festival period. The seminars and some of the tastings are free but the dinners are generally quite expensive and sell out fast. There is an "Eat To The Beat" concert series featuring mostly oldies acts--DH and I saw Three Dog Night and Cool and The Gang there last year, and The Fifth Dimension the year before.