Okay, here's what's going on for those who are out of the loop - or simply don't know what's going on.
On Saturday, December 6th (today) - Famitsu let slip that the "huge announcement" is actually Metal Gear Soda. The flash splash-screen that a good lot of you have already looked at is for a Metal Gear ARG that is going to tie in with the soda line-up on November 12th.
Famitsu withdrew the statement, but shagg_187 was able to copy it:
This is an example for a design competition that will be held on a monthly basis for the product's run. Consumers will be able to submit artwork to Konami, and the best submission will be printed on the month's run of the soda. The artwork will also be packed as a poster in Famitsu Magazine and Shonen Jump.
Currently, only three flavors are known:
Liquid Snake Grape