RLV News has been posting on some increased posts by Lunar Lander Challenge competitor Unreasonable Rocket:
Fabricating our first vehicle, a post that includes lots of details and links to the parts vendors
A trip to DC to find no Unreasonable Requirements from the AST
Unreasonable Rocket T-shirts
I just have to recommend that you check often with all of the Lunar Lander Challengers' web sites for the lastest. I have a hunch that it will be hard to keep up, as it was last year, when the challenge date approaches.
Update on May 24: AST News with some thoughts on what one writes when going through the AST paperwork process (link from RLV News)