While you've been busy casting votes for your favorite online communities in the Open Web Awards, the folks behind the scenes at Download Squad, Mashable, and 29 other participating blogs have been casting votes as well.

Tomorrow we'll have the complete list of of winners based on your votes. But it turns out it's a lot easier to tally up a few dozen votes than tens of thousands, so today we bring you the Judge's Choice winners.

Mainstream and Large Social Networks
Facebook

Applications and Widgets
Flock

Social News and Social Bookmarking
Digg

Social Search
Mahalo

Sports and Fitness
ESPN

Photo Sharing
Flickr

Video Sharing
YouTube

Start Pages
Netvibes

Places and Events
Meetup

Music
Last.fm

Social Shopping
Woot

Mobile
Twitter

Niche and Miscellaneous Social Networks
FilmCrave

Let us know what you think of our choices in the comments.