Doubtful. Then again, European prepaid is inexpensive. It makes most sense to get an unlocked GSM phone and buy a SIM card at the destination country.
GSM: SaskTel Canada (postpaid voice + data), Rogers Canada (postpaid data), T-Mobile US, AT&T US, Red Pocket Mobile US, Orange UK, 3 UK, Swisscom Mobile Switzerland, tele.ring Austria, airBalticcard (Estonia)
CDMA: PagePlus US
GSM phones: iPhone 4, iPhone 3G, Nokia Nuron (AWS 3G), Otech F1 (quad-SIM 2G GSM), Nokia E63, Sony-Ericsson K610i, Sony-Ericsson Z310i. All unlocked.