Good list, thanks for digging it up.....

I also have several of the "multi-country" adapaters listed earlier, although mine are blue . It covers "most" of what I need, mainly the UK (and some former holdings), the European two prong adapter, and a set of swiveling flat blades. The only major exception I've found requiring new adapters was South Africa/Swaziland, which use a plug about the size of the UK socket, except with round prongs. Some just have to be different (and the US "standards" are top on the list).

As noted already, carefully check the voltage rating of the device you are plugging in. Most of my electronics are dual voltage, but not all. Anything using a "wall wart" type transformer (battery chargers, cell phones, PDAs, etc..) are probably set to a specific voltage. They don't seem to mind getting a lower voltage (although it won't work), but going the other way causes a funny smell in the hotel room, and it definitely won't work again.

Anyway, I also carry a multi-country phone adapter around with me, although it doesn't get as much use since I rarely need to dial up for internet access anymore. You think the number of power standards in use are bad, check out the various phone systems!