What is PuzzleBang?
Almost half a decade ago, two UIUC undergrads (Benjamin Juang, David Tan) enjoyed an annual event called PuzzleCrack during the ACM R|P conferences. They found they really liked solving puzzles and when they discovered that there wasn't going to be a PuzzleCrack for ACM R|P 2011, they decided they would try their hand at running their own puzzle contest.
PuzzleBang 2011 was awesome, PuzzleBang 2012 got better (in terms of prizes, anyhow), PuzzleBang 2013 resulted in doubling our turnout, so Ben and David are back to confuddle and distract you from lectures and homework once again in 2014!
tl;dr: Here be puzzles. Fun is mandatory. Not having fun? Please tell us!