They don't have the ability to do E-key yet. However, I have suggested it to Supra.
IMO, the Blackberry is far superior to the Treo in technological terms. Although Treo now boasts their own "push" technology, it still is slower to get emails than the BB. I had a Treo for about a month, and even though it has the E-key capability, I preferred the BB.
I am really excited about the iPhone. The only drawback is that our MLS does not work on Safari (Apple's browser).
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Greg Sargent
Licensed Georgia Real Estate Broker.