I'd point you in the direction of Carl Malamud, Jim Harper at the Cato Institute, and EFF, probably in that order. Jim's made it a project to liberate government data; Carl's gone further and made it his life's work.

Inside Congress itself? Hmm. I'm spending my time working on http://recent.io/ and now paying close attention nowadays. But if you're local to the SF south bay try Rep. Lofgren? I've done some Q&As with her and found she's one of the smarter and well-informed members of Congress on tech policy issues.