When to Begin Taking Social Security

Are there any recommended resources for the decision about when to begin taking Social Security?

I am especially interested in input for those who are relatively well-off (with assets in excess of $1 million).

Glossary: 

There are many good resources for this decision.

An Annuity Digest interview with Henry Hebeler might be useful--he actually provides some free calculators to help people with this decision: http://annuitydigest.com/blog/tom/interview-retirement-planning-expert-h...

I also just read an article that may be of interest--it can be found here: http://www.fa-mag.com/fa-news/5198-even-the-rich-worry-about-social-secu...