Check Yahoo! or turn your TV to any of the news channels, CNN, Fox News. Latest word, it MAY be televised apparently if the Iraqi's decide to allow it. Fox is saying it may happen today but no later than tomorrow.
Expect this to be done quick, any waiting around will allow the terrorists within Iraq to mobilize and really launch something major. We will prolly see a quick spike in attacks over the next few days because of this.
Edit: For the US, it will happen later today due to the time difference but in Iraq it will already be Saturday when it happens. Word being passed around is sometime in the next few hours.