Hi Alexander,
You are right! Free hosting, free email, tag based systems exist for
quite a while and they can be used for the exact same purposes that I
mentioned in my original post. Common, everybody knows how to configure
DNS to serve hashes (sort of distributed rainbow tables crack).
However, google base it a bit different. First of all Google has
enormous storage facilities. You need around 85g for a decent rainbow
table. I don't think that I you can find that for free. Yes, maybe,
Google Base is not that well suited for this kind of stuff but, still.