A great post from Boriss on using Amazon’s “mechanical turk” process for user research.
Her conclusions (about the European browser ballot) are interesting too, but personally it’s the research method that interests me most. Is it possible to get an accurate picture of your target audience from a group of self-selected responders? The answer to this question is obviously very relevant to Test Pilot.
While you’re at it, you should read Boriss’ posts on improving the Firefox Add-Ons Manager here and here. In fact, if you’re at all interested in Mozilla usability stuff you should be reading her blog regularly.