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nela said:
what is the best way to stay on top of all the upgrades of mwsf?

Macrumours and some other Mac sites will post notes as the Keynote is going through, just come back here on the day and they should have a link to their posting page
 
If past MacWorlds are any indication, MacRumors will switch to a stripped down site and report on the keynote as it goes on. Another way is to go to a IRC channel, some will have someone reporting.
 
Of course obviously being at MWSF is the best and most fun. Just to be able to interact with other Mac users and the exhibitors.

MacRumors does a very good job of keeping us updated minute by minute of was occurs at MWSF. I usually just check that day to see what available.
 
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