From a post by Jeff Lait – here is the information on this years 7DRL

1) Any time on March 8th or March 16th (as measured in your time 
zone), register on http://7drl.roguetemple.com 
2) Write a roguelike. 
3) After 168 hours, if you have completed a playable roguelike, add your 
download link to 7drl.roguetemple.com!  If not, set your status 
to failed and we will all commiserate and agree that given a few 
scant more hours, it could have been great.