Gone (soon) but not forgotten, Part Two

Justice Stevens has announced that he will retire from the Supreme Court in June. The announcement is hardly a surprise, and we (among many others) have been speculating for months about who will replace him.
The three names one hears most often are Elena Kagan (currently the Solicitor General) and appellate court judges Diane Wood (7th Circuit) and Merrick Garland (D.C. Circuit). Kagan is considered the most likely nominee; Garland, I believe, would be the best of the three.