FYI. From HS's website Sunday night:

Product Name and Availability

Treo 600 Due to high order volume, please allow up to 1 week for your order to ship.

Treo 300 In stock

Treo 600 Accessories

Cases and Beltclips In stock
Styli and Keyboards Treo Portable Keyboard: Coming soon
Cradles, Cables and Power Treo USB Docking Cradle, Treo Double Charge and Treo External Battery: Coming soon
Headsets and Headphones Treo Stereo Headphones: Coming soon
Car Kits Treo Installation Car Kit: Coming soon