But...i found it in the O2 page, here on PrePaidGSM.net!
Intenational calls to EU/USA are billed 0.29€, according to
PrePaidGSM: O2 (Germany)
Italian main SIM Cards:
3 Italy
iPhone 3G 8GB with 3Power (postpaid offer)
Vodafone Italy
Nokia N73 with Vodafone Tempo Libero (postpaid offer too)
International SIM Cards:
1 United Mobile (mmh...when it works)
1 Vodafone UK