I have taken the time to watch nearly all of the treasure hunt flashes posted on the frontpage. Some were good, some were bad, but there was no clear winner that I felt warranted me to speak up.
That changed when I watched theratbook's "A paedophile story". It is a complete mystery how such a marvel of a flash made it through the portal with under 4000 views and no awards... It is one of the finest pieces of animation I've ever seen on this website, or anywhere for that matter. The visuals are astonishingly masterful, and perhaps more importantly, the message is powerful and eye-opening.
I think "A Paedophile Story" is the clear winner of the 2010 treasure hunt, and I would even have considered it a contender for the annual tank awards in 2009, when it was submitted, had it not been so tragically overlooked.