Linguist List, mailing list and other resources for linguists
Ethnologue, database of all of the world's known languages (6,809!)
American Dialect Society, the academic association concerned with the study of the English language in North America
American dialect links: links to sites concerned with American English dialects (Note: Many of the sites are not at all scholarly, but still interesting sources of data. And some links are dead.)
English dialect links: links to sites concerned with non-American English dialects (Note: Many of the sites are not at all scholarly, but still interesting sources of data. And some links are dead.)
ASL Browser, an online American Sign Language dictionary, complete with movies of the signs
American Sign Language Dictionary, another ASL dictionary, with jerkier movies and fewer signs, but also a few entire stories and some signs from other signed languages.
"Committing to an ontology", a paper on the shape bias and related issues by Eliana Colunga and Linda B. Smith of Indiana University.
Estuary English: very useful and informative site by a phonetician and expert on English accents about Estuary English, which some people believe is becoming the new standard accent of England