Web 2.0 Apps Done Right

I have blogged several times about web 2.0 applications and what I look for in them. I have been evaluating a lot of applications lately and a good application really stands out.

I have been looking through Image and Photo sharing applications all day and comparing them against each other. Man there is a lot of crap.

One appliceation that I think truly reflects a quality Web 2.0 applications is the image sharing site 23. The have the key characteristics:
They do it well, congrats guys.