I came across this, and figured I'd share:

From:
http://allergies.about.com/od/foodallergies/a/sulfites.htm

Here is a list of sulfite foods group by qty:

Greater than 100 ppm of sulfites (very high levels, strict avoidance advised in people with sulfite allergy)

* dried fruits (excluding dark raisins and prunes)
* bottled lemon juice (non-frozen)
* bottled lime juice (non-frozen)
* wine
* molasses
* sauerkraut (and its juice)
* grape juices (white, white sparkling, pink sparkling, red sparkling)
* pickled cocktail onions

Between 50 and 99.9 ppm of sulfites (moderate to high levels of sulfite, avoidance advised in people with sulfite allergy)

* dried potatoes
* wine vinegar
* gravies/sauces
* fruit toppings
* Maraschino cherries

Between 10 and 49.9 ppm of sulfites (low to moderate levels of sulfite, may cause symptoms in people with severe sulfite allergy)

* pectin
* fresh shrimp
* corn syrup
* pickled peppers
* pickles/relish
* corn starch
* hominy
* frozen potatoes
* maple syrup
* imported jams and jellies
* fresh mushrooms
* imported sausages and meats
* cordials (alcoholic)
* dehydrated vegetables
* various cheeses
* corn bread/muffin mix
* canned/jarred clams
* clam chowder
* avocado dip/guacamole
* imported fruit juices and soft drinks
* ciders and cider vinegars

Less than 10 ppm of sulfites (very low sulfite levels, generally do not pose a risk, even for people with sulfite allergy)

* malt vinegar
* canned potatoes
* beer
* dry soup mix
* soft drinks
* frozen pizza and pie dough
* beet sugar
* gelatin
* coconut
* fresh fruit salad
* domestic jams and jellies
* crackers
* cookies
* grapes
* high fructose corn syrup