This is great.
I see a great use case for this on this very own community site and I can think of some plugins that could use funding for either maintaining it's existing or developing new ones.
Since I still have not launched anything yet based on Elgg and I thinking of abandoning my initial project this makes me think of new project I could start working on :)
Ah, and congratulations for the causes you're using it for Michele, that's great too!
Thanks Dries, highly appreciate your comment!