For the iPhone? It charges by USB, even TV sets can charge it.
The apple charger is 100v to 240v,
Um, yes, I'm aware of all this...
all you need is the plug adapter kit from CVS.
I was trying to figure out
which adapter to get. Is Greece not standardized around one outlet type?
*edit*
I see that there's a standard European plug type. It's been a while since I've been over there so I wasn't sure. I'll just order a 3-pack of adapters I found on Amazon

Travel tip for Canada/USA folk: take along an ordinary 2-prong household extension cord with three outlets. Then get a single plug adapter for use with the extension.
Good tip, Mark. I do usually bring a travel power strip, but it's a three-pronged grounded strip, so I don't know if it would fit into the adapters well or not.