We know that "Dr." King is in heaven?

A couple of tidbits from Rick Warren's invocation at the inauguration of B. Hussein Obama:

And, we know today that Dr. King and a great cloud of witnesses are shouting in heaven!

Really? How does RW know that MLK is in heaven? Alan Stang provides a succinct lowdown on "Dr." King here and here.

...but whoremongers and adulterers God will judge. Hebrews 13:4b

Also: I humbly ask this in the name of the one who changed my life...

The reader will notice that RW doesn't refer to the Lord Jesus Christ (in fact, RW doesn't refer to Him as the Lord Jesus Christ) as the One who takes away the sin of the world (John 1:29), and before whom every knee will bow (Romans 14:10-11), but in typical man-centred evangelical style, merely as the one who changed his life. That seems to leave it open to the listener to let his life be changed (or not) by Jesus--or anyone of the listener's choice. Not that this is unusual for Rick Warren--just listen to his TED talk from 2006: