Information Research Weblog

Heather Morrison's Imaginary Journal of Poetic Economics has a useful entry for sources of data and information on open access.

One source she points to may be of interest to a lot of people: this is OAIster - pronounced, judging by its logo, "oyster". OAIster harvests open access sources and currently covers getting on for 12.5 million papers. An excellent tool for lesser known journals that may still contain something useful for you.