Perhaps I shouldn’t get excited over new web 2.0 services, since as Asheesh points out they’re proprietary and you have no control over them. That said, if you’re using web services like Flickr, it’s good to have accounts on competing services so that if they suddenly turn evil for some reason you can switch to someone else without too much trouble.
One thing that’s cool about Zooomr is that you don’t even need to sign up to get a free account… if you have a Livejournal account or a Google account, you already have a sign-in for Zooomr. I wish more services would use OpenID or something like it (I’m told OpenID has its flaws), it’s fun and easy ^_^
UPDATE (August 17, 2011): Five years later, none of my images on Zooomr are loading, including the one in this post, and the site looks rather ugly and abandoned. The problem with playing with trendy new web 2.0 services is that if they are a fad and you actually rely on them, you may be left out in the cold.