Alas, FOIA applies only to federal government agencies that are in the executive branch. It doesn't apply to federal courts or the U.S. Congress.
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.