I've never had a problem using my ATM card outside the U.S...Europe, Middle East, Asia. I've never called my credit union ahead of time to tell them I was going anywhere. (I see that mentioned from time to time on this board.)

If you're overly concerned about your existing account, maybe go and throw a few hundred bucks in a local credit union. That way you'll have a backup ATM card if BofA doesn't work...

I also saw advice on this board somewhere that suggested international travelers have accounts with two credit unions - one that has a Mastercard/Cirrus ATM card and one that has a Visa/Star ATM card. That's probably good advice, although I have yet to run into a country where Visa doesn't work. Maybe a search on the specific countries in question would tell you whether one network is more dominant than the other there...