I just wrote it in my
blog (sorry, it's in italian :P ), but Vodafone Italy has the first agreement of international roaming with
SMT
It's not a
real international roaming, in fact VodaIT customers don't pay incoming calls in San Marino and I think that in the future SMT customers won't pay anything in Italy for the use of "red network".
The nice thing is that SMT doesn't have yet a tariff plan and any customer while its coverage (2G+UMTS) is very good (they have a good coverage in Rimini too

)... at least, VodaIT customer when they are 'abroad' pay using SMT a 25 ct / min (60/30) tariff. So strange... I hope for RSM's people that they can have a better deal for the use in Italy :P