What stage of release is this in? Are there any significant changes coming up?
In particular, I don't see any attempt to prevent spam. I'm not even talking about purely bot-generated spam - I mean, I just submitted that "Ghandi Christ" (email abcd@efg.hij) will not be coming to the following event:
http://mobaganda.com/rev2party
Which I found on google.
I don't really know/see how you can fix this problem. As I noted, captchas won't work.
On a completely unrelated note, I also really long for search and the ability to make an event "searchable/unsearchable".
---
THAT BEING SAID, I think this is a really wonderful idea. If you can get it to "work" without sacrificing any simplicity I will definitely be using this.
Anyway, these are some random guy's first impressions. Good luck, yo!