Below is the official message on the Baldur's Gate web-site currently along with a 24 hours countdown, to what could possibly be the announcement of Baldur's Gate 3. As of now the web-site is off-line and you can thank reddit for that one. (screenshot of the cashed version is below)
"The Lord of Murder shall perish, but in his doom he shall spawn a score of mortal progeny, chaos will be sown by their passage."
So sayeth the wise Alaundo
Below is what the HTML comments on the Baldur's Gate web-site read. I have to assume that Shadowy Figure - Raise Dead is the title of the project to be uncovered. So expect an announcement really really soon and the actual game, whatever it is by March the 14th. Check it out (http://baldursgate.com/) as soon as it becomes available once again.
<\!-- March 14, 2012 --> <\!-- Shadowy Figure- Raise Dead : Infinity Engine -->
<\!-- It is coming. -->
Update:Here's what the actual Baldur's Gate web-site looks like now that I've finally managed to push through the insane ammount of traffic.