My apologies if this is a frequently asked question, but I haven't found a response through any search I can come up with. I'll be traveling in Europe the next two weeks, with a Cingular Moto V600 World Phone (which Cingular assures me is unlocked). I'll mostly be in London with a few days in Germany, although I expect to spend more time in Germany in the future.

Is it possible to get a prepaid SIM card that provides reasonable rates for local calling in both Germany and the UK? Extra points for ones available in London, where I'll be first.

Thanks!