Junit3123 is reporting that on ESPN's Draft Preview Rick Bucher confirmed a promise made by the Blazers to the Oden camp that Portland would take Oden #1. From Junit:
Promises like this are quite frequent and usually true. That's not to say ESPN has never been wrong before but this puts a lot of weight on the Oden side.
Update: The plot thickens! Courtesy of Jason Quick: Read rebuttal here. (And now KP has weighed in too.)
Update: ESPN sticking to their guns here.