Roses is a good place for sammiches.
Todai is a great place for sushi and many other oriental foods, mainly Japanese.
Jake's is an AWESOME restaurant for seafood and steak.
LuckyLab is the name of several ale houses that are great places to go. The most recent Portland ATOT meet was there.
The London Grill at the Benson Hotel has a great brunch.
I'm not sure if it's there anymore, but there used to be an epic deli in The Rose Quarter, run by a deaf guy. Extremely nice people, great service, excellent food.
McTarnahan's is good for their beer.
Patti's is a good Irish pub (so is Kel's).
AT had a meet several years ago at Old Town Pizza, which is great.
The original Old Spaghetti Factory is downtown on the water. Good food, cheap, and great view.
Newport Bay is right on the water, too, but they're a little pricy.
Voodoo Doughnuts is a great place with the WEIRDEST doughnuts you'll ever find. If you go late-night, there's tons of hot chicks there -it seems to be the latest fad in youthful hangouts.
Sax Fifth Avenue and Lloyd Center are great malls to get lost in for hours of entertainment.
The waterfront dosen't have anything set up right now but there's usually lots of fun stuff to do there.