I'm going to be in Japan for a few weeks with my Bold too, I'm not concerned about data usage as I've rented a Blackberry (really just for its SIM card) to use while there. Unlimited data and incoming calls, banzai. (also, f*** you and your $400 international roaming Rogers)
My intent is to swap out my SIM for theirs so I can use my email, my bookmarks, my apps, etc. My phone will simply be forwarded to the Japanese rental number. (another big f*** you Rogers for blocking international forwarding.. but I beat that too. Thanks, Skype!)
1 - Will I need to reconfigure any of the data access providers etc, or resend service books or will that be pulled automatically when the DoCoMo/Softbank/whatever SIM boots?
2 - what is the current state of Google Maps? Do I need to force downloading, or manually load something, or will it simply pull them when the GPS detects where I am? I'm less concerned about the language, I can decipher it but having the maps themselves is the important part.