Mark, some states have laws in place that require that both parties be told of the recording. I forget the states that have such laws, but be aware that recording someone without their permission could be in violation of some state laws.
quick googling turns up the following - http://www.callcorder.com/phone-recording-law-america.htm the states that require both party consent (according to the above link) is as follows: California, Connecticut, Florida, Illinois, Maryland, Massachusetts, Michigan, Montana, Nevada, New Hampshire, Pennsylvania and Washington. -Pete
