OS X Lion - download once and install on multiple computers I have multiple computers which I will be installing Lion on. Is it possible to download it once and install on those computers?
It will be, as announced on WWDC 2011 keynote.
It will be delivered via the App Store for $29, and you can use it to update your other authorized Macs as well.
I'm not to keen with the details. Sorry.

Link to the keynote:
http://events.apple.com.edgesuite.net/11piubpwiqubf06/event/