There was a story in the 09-09-09 Bsoton Globe about the best fish tacos in Boston. The link to the story is http://bit.ly/138O27 They all look/sound good! Their top picks were La Verdad and Dorado Tacos & Cemitas.
A friend from SoCal introduced me to these a few years ago. They can be anything from cheap "street food" to fine dining and they can vary widely in the preparation/style. But that's one of the things that makes it interesting...
My favorites north of Boston, so far, were at the now defunct 931 Ocean in Hampton, but I also liked the ones at Surf in Nashua.
What are some others worth trying in New England?