Well for pre-order any way... 
It's a bonza phone, I do love it. I've been lucky enough to play with it a few times and I think this is what we have been waiting for in the world on one handed operation. It might even tempt me away from my trusty SP5!
It's a shame if it doesn't come with WiFi, but if I'm honest it's not often I use mine on the SP5. (Even though saying that it nice to have)
I'd be interested to see if the ROM is any different to the one I've been using though. Will it have Messenger on it? What about the 3G TV client that the NOkia's have from Voda Live...
But hey... We'll see... In less than 6 days time :)
EDIT:
Here's a thought... Looking further into the website specs. Do you think it's saying HSDPA here?
Exclusive to Vodafone, the new Palm® Treo™ smartphone is an industry first, using Vodafone's high-speed 3G network and delivering Palm's ease of use on top of the Microsoft Window's Mobile® operating system – all backed up by Vodafone's dedicated service for business.