Exactly what it says in the subject line.
A pretty good list; I can't think of any major covers I'd have added. I notice a distinct lack of Ultimate Spider-Man covers, and I kind of agree; even though I love Mark Bagley's work, most of the USM covers, while being awesome images, are fairly lackluster covers. Heck, the first ten issues were nothing but Spidey in different poses.
I also think having Amazing #36 is totally cheating, but I already have issues with that comic in general.