Three articles in today's New York Times may be of interest:

"Heart Scans:  Finding More Than You May Need to Know"  -- tells the
story of George Skouras, a 52 year old man who decided to go for a
complete physical exam.  He had a heart scan and found out that he had
plaque buildup in his coronary arteries. The article discusses the
question of whether this information benefits him, given that he
already knew that his cholesterol was high.  Various experts are
quoted.  In the case of Mr. Skouras, the test results motivate him to
lose 16 lbs through diet and exercise, reducing his LDL by 30%.  He is
reluctant to take a statin, because whether doing so will benefit him
in the long run is unknown.
http://www.nytimes.com/2007/05/01/health/01cardiac.html?ref=healthspecial3

Also:  "Finding Whether Diabetes Lurks,"
http://www.nytimes.com/2007/05/01/health/01diabetes.html?ref=healthspecial3

"How Does Your Waistline Matter? Let Us Count the Ways,"
http://www.nytimes.com/2007/05/01/health/01obesity.html?ref=healthspecial3

Marilyn