Hi,
on the roguelike-dev chat room (#rgrd @ quakenet), we have spontaneously decided on a new challenge - the October 2010 4DRL Challenge!
To join in you only need to register yourself at http://typewith.me/kbrJYIJHqT.
The challenge takes place on 4 consecutive days of your choice between 22/10/10 (Friday) to 27/10/10 (Wednesday) - that’s in a bit more than 1 week from now.
-Ido.
EDIT: changed the doc to state explicitly that you are allowed to use existing engines, libs, code, graphics, sounds - you just need to mention what you used afterwards.