Dropbox has started another Dropquest with more chances to get more free cloud storage.
What is Dropquest?
Dropquest is a multi-step scavenger hunt that has you solve a series of puzzles (inspired by the likes of MIT's mystery hunt or notpron [though not nearly as time/effort-consuming]). Everyone who completes Dropquest will get at least 1 GB of space (even if you participated last year). Also, everyone starts at the same time, but the questers who finish the soonest get amazing prizes!
Here's a link to last year's Dropquest thread
Click here for Dropquest 2012