Run a search on the key words "overseas jobs at Google .com. There are many listings for job services specializing with overseas work. One particular stand out -- http://www.advocacy-net.com/overseasmks.htm (remove any spaces in the URL). This website claims links to 500 sites on the net dealing with overseas jobs.
Some issues to be aware of (I've been down this path):
Language - most foreign-based companies are more likely to hire native speakers unless you have a talent/skill that just isn't available in-country.
Movement costs: Money is tight all over. It can cost tens of thousands of dollars to move someone from the States to Europe. Again, companies are more likely to hire locally unless your particular talents/skills aren't available locally.
Global corporations: Your best be might be to try US companies that have a presence overseas. Indicate your willingness to work overseas. I would be willing to bet that many companies have openings where they must settle for local workers when they would rather have an American to fill the job. Many Americans have a phobia about actually living overseas. It is often a matter of "It's a nice place to visit, but I wouldn't want to live there!"
Good luck in yourhunt.