There can only be one good reason to ask you to vote for Classroom 2.0 at the 2008 Edublog Awards site: were we to win again, we'd be introducing more folks to the value of Web 2.0 and social networking in education. And that, I think, would be a good thing.
But it would also be a good thing to vote for one of the other nominees, so I have mixed feelings. :) Please do look over all of the nominees--of the ten, nine are Ning-based networks. And they are all doing very good and important work using social networking. Who would have guessed that would be the case two years ago? Even last year at this time, when Classroom 2.0 won the award in this category and "only" had 4,000 members, seems a long time ago related to our perceptions of social networking for professional development or classroom use. Today, with 15,000 members (amazing), I still feel that we're only just beginning to understand the power of this technology for good.
So no matter who you vote for, please do vote. http://edublogawards.com/2008/best-educational-use-of-a-social-networking-service/. And tell a friend!
There are also a ton of other exemplary social networks being used in education that didn't get nominated, a number of which can be seen at http://socialnetworksined.wikispaces.com (you can add your own networks there as well if you haven't already). And if you are wanting to use Ning for educational purposes and haven't joined http://education.ning.com, I would encourage you to do so!
Finally, do check out the other categories in the 2008 Edublog Awards: the main link is http://edublogawards.com/2008.