Well, have been trying to download 10.8.3 for over an hour now. Most of that has been just trying to pay for the bloody thing. I haven't purchased anything from Apple in a year or so and this is my first app purchase, seems they don't like that. New corporate culture thrives on complete obedience. Another problem was that I use a password generator, which won't work with Apple. Guess they don't like too much security.
As of now, the itunes store shows the 10.8.3 page with a box under the kitty picture saying "downloading". There's no temp file on the desktop or any other indication that anything is happening. Usually a pane pops up showing progress during a download.
Yep, it just gets easier and better all the time.