The Northrop Grumman Lunar Lander Challenge isn't the only lunar competition taking place. There's also the ESA Lunar Robotics Challenge. I'm going to take a number of links from a Google Lunar X PRIZE Forums post:
Check out the teams and their robots:
http://teamasl.blogspot.com/
http://surreylunarrover.wordpress.com/
http://pesapod.blogspot.com/
http://esalunarchallenge.blogspot.com/
http://www.aeonity.com/moerri
http://robotics.jacobs-university.de/space/ESA-LunarRoboticsChallenge.htm
http://cesar.dfki-bremen.de/
http://robcib.etsii.upm.es/blogs/moonhound/