Update from yesterday: I think I've decided to go with the Blackberry 7250. Verizon Wireless has confirmed numerous online forum reports that EVDO will be avaliable for this model. (According to these reports, the timing is in the next 1-3 months.) Upgrading will require a simple visit to a store to update the software. I had been under the impression that the 7250 was not capable of high speeds, but this is a software, not hardware, function.

It's true, as one person pointed out, that more third party enhancements will be available for the Treo since that runs Windows. But I think the Blackberry's better screen offsets that concern. I am getting this primarily as a mobile data device and a clear screen is high priority.