Nerdy puzzles, a whole year's worth

I was at MIT last weekend, spending a day at QIP 2005. While some of us pondered what the world would be like if our computers were quantum, some thirty-odd teams of hypernerds grappled with the puzzles of Mystery Hunt 2005, all for the sake of a worthless coin (which was duly found by the winning team). Click the link for a year's worth of these puzzles.

Especially recommended puzzles, based on what I've read so far: Commencement Ceremony (start with this), Heavenly Hash, Odd Man Out, Ginormous.