Very cool! I really liked the registration process, very smooth. I also like that you made it clear that I could delete my account if I wanted on the front page, before registration: that made me much more likely to sign up.

One point: your Google map uses custom icons, which are cool I suppose but I'd prefer the standard ones for the sake of consistency. More importantly, I'd like to see an info box appear when I click an icon on the map: it took me a bit to realize that full info was being displayed below. Otherwise this is a great tool!