It looks like all the previous vendors (eXpansys, Amazon UK and other suppliers) of the Unlocked Nokia N900 have been consistently denied product to sell by Nokia. Now the word is, that the N900 will be exclusively the product of The Carphone Warehouse (with a Vodafone ontract) and Vodafone UK.
This means only one thing, there will be NO SIM Unlocked Nokia N900’s. They will all be locked to Vodafone SIMs and further OTA updates will be to Vodafone specifications. With the advent of Vodafone 360 they will be more and more tied to this service. You really can reach no other conclusion, so much for Nokia’s commitment to Open Source and Open Source developers.