From my conversation with a T-Mobile sales representative in North County San Diego (CA) on Friday, he stated with certainty that T-Mobile will NOT offer the Treo 650. In addition, I spoke with a close friend who works as a store representative for T-Mobile and she told me that the Western Region Leadership Team also told her that T-Mo will not be offering the 650.
On the other hand, I called T-Mobile's customer service number today and asked the Sales Department when they would offer the 650 and she said "very soon!" Go figure! I have a Treo 600 and I'm tired of seeing my friends wave their nice Treo 650s in my face on a daily basis.
If coupled with my poor reception since relocating to San Diego, if T-Mobile dosen't offer this phone soon, I would be very willing to pay the contract termination fee to go with Verizon for better reception AND the Treo 650.