1) If you'd like to back up the packages before you lose them (they get deleted on restart), open a terminal and
cd /private/tmp/501Of course, you can use any destination and name you like, and you need to do this after the packages have installed but before you select restart in the installer.
cp -R 10.0.2Update.pkg/ ~/Documents/newname
cp -R iTunes.pkg/ ~/Documents/newname2
2) iTunes now has a dockling that includes "Bring to front", "Quit", "Play", "Stop", "Pause", "Next Song", and "Previous Song" (or "Open iTunes" if it's not running). It also runs visuals full screen, and (of course) includes burning!
3) From looking through the installer files (after install, run the installer package in /Library/Receipts, proceed to the "Select Destination" step, then under the File menu, pick Show Files; quit the installer when done reading) it appears that there were updates to mail.app, the login panel, audio drivers, and a whole slew of other drivers (including possbily SCSI?).
The updates are available through the Software Update panel in OS X, and as standalone downloads from Apple.

