I used the phone in Europe (Belgium, Swiss and Germany) during my trips. It works great in all these countries. I am currently with ATT WS and I only used their voice service. Not sure how well their data service work.
The v600 charger will work in 220V power as long as you have the right outlet plug. You can go to RadioShack to get the international power outlet plug. You don't need to spend money for the power converter (change 220v to 110v) -- just the outlet plug will do the trick. The v600 charger will work on both 110/220v.