I think we should have a samples thread where we can all post and share samples that we've collected over the years so that, even if you have samples in your collection that you never have/will never use, other people can get some use out of them.
I will start off by posting a link (sorry, I haven't gotten around to *actually* sampling this yet, but this weekend I will) to the awesomely eerie "sounds" coming from the Comet 67P/Churyumov-Gerasimenko, which Philae recently landed upon.
You can find the Soundcloud clip here.