Here’s what we know:

• Jimmy Fallon‘s vlog debuted last night on NBC.com.
• Late Night with Jimmy Fallon will premiere on March 2, 2009.
• Jimmy’s house band will be The Roots!
• Conan O’Brien will take over The Tonight Show on June 1, 2009
• Jay Leno is not exiting NBC after all and will in fact be hosting a prime time talk show 5 nights a week at 10PM. [NYTimes.com]

That’s pretty much what we know.