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Dunno where the guy who wrote this article got his info. Push has worked on EDGE for blackberries and other phones for years now. Should be no different fro the original iPhone.
 
Did you read the link you posted?

It starts with an editor's note basically saying "oops, we screwed up."

sorry i was reading it in Google Reader... my office blocks the actual TUAW site, so i didn't see the actual page.

good news...
 
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