FedEx guy dropped phone off at 1:50 pm.
Opened box, Started charging at 2:05 pm.
Called SPCS from land line while it was charging.
The CSR couldn't have been more pleasant!
By 2:20 pm the phone and Vision both working perfectly - called the phone and it rang and browsed the web.
It actually started the vision provisioning cycle while I was still chatting with the Sprint CSR and she had just said to allow at least 1 to 2 hours. And I said - hey its provisioning now!

All in all, switching ESN's was a breeze.

After the phone is fully charged I will attempt to sync all my stuff over from my Treo300. Hopefully that will go as smoothly as the activation.