Camps, Clinics, and Competitions
This site maintains an impressive library of essays treating the accordion, which range from the accordion as a chamber instrument to establishing the Chinese accordion school to the Tex-Mex sound. The FAQ section not only answers a large range of questions, but also links to a list of international accordion competitions. There are also pages on accordion history in different countries and on accordion jokes.
Harper's International Gig List
This offers a very long and detailed list of harmonica performances, competitions, conventions, and festivals around the world. The listings are up to date and many offer contact numbers or Web addresses for the organizers.