If you look on the page, the writer of this piece makes a comment that maybe Archbishop Levada may only be considered for a lesser post. Even he doubts the reliability of this rumor. Aside from anything else, I find it hard to believe a U.S. bishop and a noncardinal would be picked for this job.
Living near Levada's diocese is no fun. However, I do know that the priests in his diocese are sick of all of the trips he has taken to Rome over the years. They say that he has campaigned for a high curial position for years. I pray that he doesn't get one.