I’m in as well.
This will be my second Ludum Dare entry.
I will be writing the game in C++ using OpenGL, SDL and some base code which you can find here: http://dl.dropbox.com/u/189744/ld23_basecode.zip
Some of the tools I will use are: Sublime Text 2, sfxr, gimp.
I’ll start on a Linux version first, and will port to Windows and Native Client as soon as possible after the deadline.