The easiest way to charge an ipod abroad is to purchase a recharger which can be pugged directly into a wall socket. Ensure you are using correct European plug adapter.
Use your same ipod charger but you will need to buy a power adapter before you go. Very economical voltage adapter kits can be bought online or in electronics or general merchandise stores. The product packaging will tell you where you can us it but most kits include the standard European model.
Take a laptop and your ipod charger. Additionally you can use your ipod cord and plug that into a ps3 or ps2 and charge it. You can always buy a charger for the car. European cars also have cigarette lighters which you could use with car charger. I'm sure you can also find chargers made for European outlets.
There are a couple ways. If you're going to be there long you could buy a charger there, or get a converter for your regular wall charger. If you'll have computer access, just charge it with the USB cord.
Before traveling to Europe, you can purchase an electrical connector that will connect american products to european outlets. Most major electronic suppliers, such as radio shack, will carry the connectors that you need. If you are already in Europe, you will need to have one shipped to you from the internet.