I fully expect to.
I spend half my year in Seoul. I found out that Korean Telecom will carry the iPad there, around June (similiar to AT&T in the U.S. although I don't know the cost of the plans yet.
The 3G model comes with a tool to open the micro-sim tray so you can replace the micro-sim with your foreign carrier's. Get a data plan (I hear pre-paid are often available in European countries, and you're good to go.