Crab Louie, on Commercial Street, is absolutely killing. In this town that is starved for anything even resembling a halfway decent taco or burrito, they are making exceptional fish and shrimp tacos, along w/ oyster Po' boys and more traditional crab shack offerings.
The decor is no frills and a touch fluorescent, but it's worth it. For $7.99 you get a very large fish taco in a soft flour tortilla, with homemade red cabbage slaw, super fresh and not oily fried fish, and a touch of zingy sauce. It is now my favorite lunch item in town.
The sad thing is, it being Portland and all, I'm pretty sure they won't last. So get one while they're there (and help keep them in business!!!)