I ran into a little hickup when updating Aperture, it wouldn't show up in Software Update and wouldn't install after manually downloading it. There are two main reasons for this:
(1) Aperture does not reside in /Applications or has been renamed (into e. g. Aperture 2.0).
(2) Aperture has not been launched under a sys admin account.
#2 was my problem, so I thought I'd let everyone know when they run into problems.
I'm glad Apple acknowledged the problems 2.0.0 had with the book printing service
