Web 2.0 and Internet and Web Applications

I confess I did... but after some weeks, I still haven't become a regular user.

I was prompted to signed up to Pownce when colleagues and friends did, but I've not yet reached that critical point where visiting the site becomes a natural part of my daily informational round. I don't need to transact large files all that much, because I mostly link to them on the web, and I already have preferred means of communicating with colleagues. So what's to like?