I'll be participating in Ludum Dare 19 - December 17th-20th, 2010, you can follow my dev diary of the event at Ludum Dare's site.
I'm also collecting resources at: Ludum Dare and /r/gamedev
* ANBSoft’s Sprite Manager 2 ($150)
* 3DBuzz' Simple 2D Shooter
* Unity 2D Tutorial
* Unify Community Wik
* Unity 3d Student
Also here are some Ludum Dare survival guides:
* Sol's "rules" for surviving Ludum Dare 48h
* MrFun's A Guide to the LD48
Have any to add?