Update Since posting (~1 month) we generated 30 000 songs. Awesome!
I've only told few people (not that many read my blog) about Metahypem, largely because it is still a huge WIP and a learning experience. Nevertheless, the few that have been checked it out seem to be using it quite extensively.
I haven't managed to grep the logs yet to see some interesting statistics, however we've recently passed the milestone of over 10 000 songs liberated.
That's a pretty awesome number! That many times someone wanted to hear a particular song while not at their computer or over an internet connection and we aided them in that! I'll follow up with some interesting tidbits from the request logs when I get a chance.