For the China trip to Biejing Airport code is PEK! Shanghai, Xiamen, and probably Hong Kong, I'm starting to plan how to get WIFI and/or use of my cell phone. Flyertalk has a forum page listing some of the challenges. People there suggest that a US Sprint modem card won't work because it's a different MHZ rating, though there may be China cards available. Also says Sprint has no agreement with China for mobile serve (this seems odd - I'm skeptical of that).
One suggests the hotel is likely to have power adapters but I'm guessing this is only in upscale places. During my 2003 trip to France and UK I would up jerry-rigging a plug adapter I bought in Paris for my laptop, chipping away until I got a way to plug it in. This worked partly because most laptop power supply adapters work at 240 and 120v.
Looks like a lot more research will be needed here. I'm shopping for a lightweight laptop so I can blog this trip.