Lets think about this… blue cake. The blue part of the FIRST logo is a square. Sheet cakes can be squares (although they are more often rectangles).
Add to that past years game pieces. We’ve seen a huge number of circular or spherical objects in the past 10 years. I think he’s trying to tell us we’ll have game pieces in some way related to squares (or rectangles) this year.
The game piece in 2003 was blue Sterilite containers. I suspect blue KOP containers if they try that again, as the Sterilite ones broke very easily… Either that, or a pallet of them at each event.
Sometimes I think all the Game Hint does to us is make us terrible listeners.
In playing off of that, I had an idea.
Perhaps the “blue cake” does in fact denote the shape of the object (square), but then the color also denotes the alliance.
So, for example, a team on the Blue alliance would have a square object, colored blue. Perhaps the Red alliance would have another shape entirely?
ONIONS HAVE LAYERS! - Shrek anyone?
What about cakes? Cakes have layers (Same reference)
Layers? Stairs? I think you know where this is going
Water game.
I don’t believe that I have ever actually started a game hint thread. One has to merely follow with the crowd when the opportunity presents itself. 
It was a very, very sad cake? Because it knew it was about to be eaten?
-dave
.
Nah, that’s not why it would be sad. The dream of every cake is to be eaten.
As for the rest, that better not be a strategy hint…
Give Dave credit, though, he hasn’t started a real game hint thread. Images that Dave has produced have been used to start fake game hint threads, but I don’t think he even had anything to do with that. Other than mayhem contributions.
I highly doubt it. Cakes don’t have a mind of their own. Wait… mind of their own. The robots will have to be completely autonomous this season! You sly dog! Folks, we may have Dean Kamen’s army up-and-running by 2012, as scheduled.
The robots have to collect (eat) blue square objects (‘cakes’) that try to move away from the robots (because they don’t want to be eaten).
Alternatively…
Sad=crying=tears=water
Water Game!!!
Who said cakes had to be square?
http://files.sharenator.com/the_cake_is_a_lie_RE_icon_party-s1600x1200-95588.jpg
<side note> COMPANION CUBE! D’: </side note>
Oops. I forgot. The idea still applies.
also…
[spoiler=] I lost the game:p [/spoiler]
I think you have hit the nail on the head. Either the game pieces will be quadrangles or some other part of the field (trailers like in Lunacy) will be. I am leaning toward the game pieces. Of course, there is no reason not to have all three FIRST shapes on the field (round, triangle, square) and the cake is just the first clue.
One thing for sure, we will all go crazy (those of us who aren’t already) trying to figure it out before kickoff! 
This year we’re celebrating the 20th FRC season. If your team would like to be featured in a 4 second video during kickoff, film your original, funny wishes for a happy 20th season and watch this space. I’m looking for a way to collect your videos and will let you know when I have a place for you to post them.
Are any teams considering submitting a video? This looks like fun.
Jane
There is that number 4 again its got to have some significance…
4 second tele-op
or
Controls turn on/off every four seconds (possibly on purpose)
or
4second auto
note: FTC has 40 second auto this year
4-team alliances. That’s the answer. See you in January, unless you wake me up with more hint chatter. ZZZZZZZZZZZZ…