Finally, after talking a little bit about it I have the for the first time a Google phone in my hands.
Some months ago I had a HTC Dream locked to T-Mobile thanks to a friend, but I had no T-Mobile USA enabled SIM card to play with it so I had to be happy with "emulating" one and been able to play with the Wifi connection. I any case it was a nice experience and my first impression was that it was a nice OS, even though the handset was a bit bricky.
Now I have a HTC Magic unlocked phone, even though it is VF Germany branded, to play with it in my two weeks vacation in the States. I plan to acquire a prepaid SIM card and use it to access to Internet while travelling. I will travel also with my N95 but VF Spain roaming rate makes it very difficult to really explode it.
So, hopefully in some weeks I will have a brief report of my experience that I will be able to share here.