Last year was the first time that TechEd US was two weeks, the same format Europe has had for a while. Everyone I talked to in the US didn't like the split format. We admins like to cross pollinate with our dev brethren. Even though we were told 2009 would be more of the same, Microsoft changed their minds. Today they announced that in 2009 TechEd US would go back to the one week format. You can read it in all of its wonderful glory here
Start working on your bosses to budget the money now. I plan to be there, and I'd leave to see you there.