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: