Usually sweet white wine is served with desert, or sometimes cheeses, if that's what you want, Blue Nun is sweet and is very common anywhere in the USA.
Any white zinfadel would do for non-wine conniossuers, although if you're trying to impress-most haute cuisine people would go for something like Gewurztraminer (these are the names of the type of grapes, all white wines, first two are sweet ), Riesling or California Chardonnay-this one is not sweet, but you can find it anywhere. All are good before/durring lunch/dinner.
Champagnes are usually a hit with the ladies, Spumante is sweet as well as are Sec and Doux Champagnes.
Go to any upscale grocery store or liquor store, and they will probably have someone there that can recommend and discuss appropriate wines for any occassion.
Hey Illini-Congrats on getting married! When did you tie the knot?