2G unlocked - DO NOT UPDATE!!!
It is now a little later for me that assumed the risk, and for other people that tried, but here goes the ultimate advice for people who have unlocked iPhone 2G and wants to update for 3.0 now:
DO NOT update your 2G iPhones yet!
DO NOT believe the people that tell you that you can update without being locked!!
I just updated mine (I have unlocked and jailbroken my phone many times previously), and now my iPhone 2G is ready only for emergency call.
It is now asking me to connect to iTunes with a supported SIM card, because mine is not supported. An supported SIM card is needed for the activation process.
iPhone DevTeam is working to release a Pwanage Tool today, so let's wait for it...
Thanks.
(Now my iPhone is blocked... Well, thats the price we pay to be on the edge!!)😀😛
Update: it seems that in some countries, for some carriers, it still working just fine.