Avoiding a large phone bill when travelling

This article in the New York Times 08/01/2010 edition offers many helpful tips on avoiding large cell phone bills when traveling internationally. One of these is purchasing local SIMM card which provides you with a local number along with a credit for some amount of time. It has saved me when traveling in the Caribbean. Also it provides me with an easy way to contact anyone locally and to be contacted locally.
Here is the link to the article:

Credit card foreign transaction fees going up

Most credit card companies charge fees whenever you make purchases in a foreign country. This article by Tamara E. Holmes is very informative:

Takeovers and fee hikes hit travelers — and even those who stay home
By Tamara E. Holmes

If you’re planning a foreign trip, double-check with your credit card issuers to find out how much using your credit and debit cards will cost you: Many have increased their foreign exchange fees.