Sorry, it is a lot of info. but the prepaidgsm info. was overwhelming to me too.
Yeah I don't expect to use it a lot, just something to have. Some services ask you for a mobile number, like a hotel I was trying to reserve. Wonder if they would have called an overseas mobile number though.
So an international SIM might be good but looking at the rates listed here, it looks like you can get a national SIM for 20 Euros or less while the international SIMs are at least twice that? So it seems like buying two national SIMs would be about the same as getting one international SIM.
Plus, UMTS isn't available on international SIMs if I'm not mistaken? Maybe surfing on UMTS is too much to really be something I should even consider though.