Ten teams in Northrop Grumman - Lunar Lander Challenge - RLV News - Four of the teams want to remain anonymous. Five are from last year, and five are new. Of the six identified teams, I recognized 4 from last year, which I guess means 1 from last year wants to remain anonymous.
Jon Goff from Masten Space Systems has an important question in the comments.
I'll try to get the new teams on the LLC side bar section, which is now a mixture of teams from different years (but so is my Space Elevator Games section).
X PRIZE Foundation Announces Ten Teams Vying for Northrop Grumman Lunar Lander Challenge - X PRIZE Foundation press release
The XPF LLC site lets you Match Up the teams, and has a section describing each public team.
10 teams vie for mock moon landing prize - MSNBC
Next try for $2 million lunar-landing challenge - CNet News.com
Here are a couple related links:
Spacex and Hardware is hard. - Unreasonable Rocket - LLC comments about the Falcon 1 loss, and has some lessons for anyone getting into hardware.
Without Poetry, It's All Hardware - Space for All - This is on Vanna Bonta winning the Space Frontier Foundation's 2008 "Service to the Frontier" award.