We've got one more month to go before the judges of the Demand Media/Vator Challenge select a winning vertical social network or community to fly down and meet with the Demand Media mergers and acquisitions team, including  Caith Chapman and Shawn Colo, as well as Demand's CEO Richard Rosenblatt. Since launching the competition in mid-November, 61 companies have participated!  Here's a leaderboard update of the top 25 companies, based on the number of votes. In first place is Zipidee, with 63 votes, and an average of 4.5 stars. Zipidee is an online marketplace for digital media: video, music, eBooks, ringtones, wallpaper, and more. The San Francisco-based company offers sellers a patent-pending DRM solution that protects digital goods from copyright infringement. ... [ Read more ]