Here's the low down. All pics borrowed from Seibertron.
3D Diorama
1st Place - 5' tall custom Devastator
2nd Place - Custom Prime and Arcee Wedding Cake Top
3rd Place - Megatron taking a bath.
3D Custom Figure
1st Place - Hearts of Steel Megatron by Lobo
2nd Place - Alternators CHP Prowl by Sidecutter
3rd Place - War Within Megatron by TFMaster
I forgot who all won the 2D Art catagories.
As for the Board Wars competition. We won our first game but lost the second.

The games consisted of trivia questions being answered by a buzz in type game. 5 man teams and people rotated after each question. First round questions were worth 1,000 points and second round questions were worth 10,000 points. If you buzzed in and where wrong, points were taken away.
We were in a tie breaker round when we lost but I'm still a little confused how we ended up tied to begin with. At the end of our second competition the screen showed us being up by around 16,000 points but there were some answers that had to be hand calculated. I remember we were answering almost all of them correct and they even answered wrong on a few in the 2nd round.
But it was actually pretty fun. Some of the questions were very easy but some, especially old comic questions, were pretty tough.