Holy S***
Speaking of "exorbitant"... Unless you are on a particularly lavish expense account which allows such things, I highly recommend to all you iPhone users:
use it WITH EXTREME CAUTION while abroad. The roaming charges are just sick. I mean, totally, completely, unspeakably crazy sick. I just got back from the States, where I used my my iPhone what I'd call occasionally over three weeks. A few brief calls, a bit of email, a little GPS... I let my brother check his Gmail account once when we had no internet access. Now, I left it on at first, and figured I'd be running up a tab, and sure enough, after a week or so a warning SMS came to alert me that I'd exceeded 30,000 yen in charges. So I figured OK, enough, and put it on airplane mode, but enabled WiFi, and except for a couple other instances of GPS-need, kept it that way. Figured it'd be a hefty bill, maybe 50,000 or so, anyway.
Well, I just got back & found a bill (with termination warning) waiting for me. (Not sure why it didn't get auto-withdrawn as usual -- not for lack of funds, but perhaps my bank just wouldn't auto-pay THAT MUCH MONEY...?) When I saw the figure I got a little dizzy. Suffice it to say that 50,000 was a gross underestimate, and a figure that at this point I would have been happy to pay, by comparison. I'm going to pay the bill anyway, since I really can't afford to have my service cut off. I'll talk to a service rep and see if there isn't any sort of forgiveness program.
Anyway, word to the wise: If you intend to use your iPhone whilst abroad, I'd highly recommend turning off your email accounts and avoiding using the internet, unless you're on WiFi, or GPS at all (and at least set that on "map" mode -- mine was on "hybrid" at first, which can't have helped). Even then, I'd probably keep it on airplane mode, just in case. In any case DO NOT leave it on with email, etc. enabled. Unless, of course, you have ridiculous amounts of money that you don't care about burning on your SoftBank bill. In which case, by all means, have at it.