The idea of a turtle mod is to give people a rule set, a theme to build on, and a general time-frame for how long to create your mod from scratch. Being that it's called a turtlemod, you are given a longer time to build your mod than a speedmodding event. If you don't need all the allotted time, then that's fine as well.
Turtlemodding Events Thus-far:

Ceriux :
Asaki : (Halo)
Arkage : (minecraft)
Supa : (tower defense)
All submitted files will be mirrored