A simple Flash website, which features a cryptic bright green equation against a black background, teases, "A Next Metal Gear Is..."
The easiest conclusion to jump to is that a Metal Gear game is coming to Xbox 360, when taking into consideration Xbox-like green color scheme and the last character's resemblance to the Xbox 360 power button (although that symbol is used across various kinds of electronic products).
But that conclusion doesn't seem to take into consideration the significance of the "i" and the "!". Rampant speculation has tied the "i" to the Wii, DSi or the iPhone, and the exclamation point may be a reference to the Metal Gear Ac!d collectible card-style videogame.
The URL includes the letters "mgst", leading some to believe that the "t" could stand for "touch," although it could possibly just stand for "teaser."
For now, it all remains speculation.