I am gonna tip this guy some. Great post!
This blew my mind!
I don't see anything wrong with it either if it's implemented properly, thing is though, most of us all know how to use the Bitcoin client and we all end up posting our addresses at some point if we want to receive money, I don't really think something like this would be such a big deal.
If this won't act as a "money transmitter" like theymos said, I am okay with it!