Just a heads up, but the Washington Post is going to review the Treo 600 this Sunday. This link is to a web chat, and the item is near the bottom (chat).

Also, eWeek just put out a review of the 600 (here) and elicited the following nugget from Colligan:

"We're testing a Wi-Fi implementation with the device and an SD card," said Ed Colligan, president and chief operating officer, at a party for the Treo 600 here on Friday.