I don't believe Verizon will make an official anouncement until mid next week for two reasons;
1) Verizon has a 3/4 page ad today in my local paper which includes, "Limited-time offer for our non-Smartphone customers, Get your Smartphone early. Now our non-Smartphone customers can trade up to any 3G smartphone at any point in their contract, at our best prices.
DON'T WAIT FOR THE SMARTPHONE YOU WANT."
2) I stopped in the local Verizon store today and asked the manager when they would have the HTC Incredible in their store. He said, "by the end of the month but here's my card, call me the 21st I should have a definate date.
On another note for those inquiring about Costco, the Incredible purchased there will inculde free activation and an accessory bundle.