Using your mini Mac in Europe at 220 V?

I am about to purchase the mini Mac from a Mac Store and have noticed in the specification for power input they have listed 110 V (US, Japan, South America). I spend my time between Europe and the US and would like to be able to take my mini Mac with me. I have gone to the European Apple sites and they have it listed there 110-240 V. Does that mean that if I purchase a mini Mac here in the States, I won't be able to use it in Europe because of the voltage difference, but if I purchase it in Europe I can use it both here and there? Has anyone ever used the mini Mac they purchased in the US in Europe?
Do tell, oh wise one....