I just received an email from Mike Barrett, the Blazers' play-by-play voice, and he says that Kevin Pritchard hasn't promised anything to anyone. I can't quote his email, but here are the specifics from his blog:
I talked to Kevin Pritchard this morning, in his office, and he once again stated that nothing has been guaranteed to anyone. So, that basically says the reports you've been hearing on ESPN are false. It doesn't mean Portland won't actually take Oden, of course, but no one has been promised anything in advance. Kevin was adamant about that, and said "don't believe the reports you're hearing."
You can read the full post here: http://mikebarrettsblog.blogspot.com/ .