I'm an American living in Canada. Just got my iPad 2 with 3G, and a Bell SIM card. Haven't set up service yet, but probably will soon.
I travel to the U.S. regularly -- maybe twice a month, almost always for only a couple of days at a time. I don't want to pay monthly fees for a feature I use so sporadically, but it would be really handy to have some 3G service in the States. I also travel less frequently outside both countries -- maybe once or twice a year.
Can anyone suggest a good pay-as-you-go micro SIM card that works in the U.S., and preferably elsewhere? I don't have the personal hotspot option right now, since my iPhone is a 3GS and it would be prohibitively expensive for me to upgrade it while it's under contract. I make so few phone calls that even my international phone roaming charges are minuscule. But I can really see using the 3G capability of my iPad while traveling, both in the U.S. and elsewhere.