While talking about eating at restaurants, Jill* recently reminded me of the "Can Eat/Can't Eat Cards" available through http://www.scdiet.org. (direct link to PDF.) The wallet-size card has been available to download/print for many years.
The text of the cards is shown below. They are especially useful if your schedule requires eating out often at new places. (Plus, they beat carrying a "Can't Wait" card.)
a digestive disorder. Thank you for
accomodating me. I apologive
for the inconvenience.
----------------
CAN NOT EAT
----------------
grains or flour
cornstarch or arrowroot
potatoes/sweet potatoes
corn
soy sauce/tamari
balsamic vinegar
sugar
milk / cream
beans
----------------
CAN EAT
----------------
meat / poultry /seafood /eggs
all vegetables (except those above)
butter & all oils
hard, aged cheese
all other vinegars, except balsamic
honey