Apparently o2 has managed to bring the milestone, if not to the shops, then at least to the users. There are two videos on youserbase.org that demonstrate the device itself as well as the menu navigation and a little bit of speed. Especially the workmanship is praised, Motorola apparently did almost everything right here.
In the next few days there will certainly be more reports and experiences, the wide availability of the milestone is still not established. I will try to get my hands on a device myself 😉