To be honest I don't know how you improve upon this!
The only thing I can think of is, I love the idea of the theme - I would love to see more tie in with the theme or prize. For instance I thought for sure Chewbocca would be hidden on a page with something to do with Mac, either a forum, article or Mac page. I must have looked through a few thousand of them.
I love that the 3CP-Yolk had to do with actual theme related items and a true scavenger hunt that required more than just following a few links. You had to decipher and research and it wasn't a race to see who could click three links the fasted
More of that would be great but maybe not as insanely hard. ... oh and if there is a form maybe a warning that there is an email coming LOL I thought it had to do with the answers and a redirect to the right page if the answers were right.
Otherwise the way the clues were organized on one page and the frequency and your constant input in the forums was awesome.
I love the theme ideas for next year.. Star Wars was awesome.. who doesn't love star wars. I like Mario and Luigi, Star Trek, ...
Oh and one last idea.. what about a pre-kickoff egg designing contest (using CC software of course) where we can submit our egg design and you pick the winner and we get our egg used in the hunt?? That would be cool bragging rights here since we're always arguing over who is better at graphic design in my office