Mitral valve prolapse
A review of this common condition by your Guide.

The Heart Information Network
A well-written summary.

The MV Prolapse Center of Alabama
Keeping in mind that any MVP "Center" will tend to be dedicated to attaching complexity to the condition, this site actually presents a reasonable review.

The Texas Heart Institute
A good general review of MVP

Staying on top of Mitral Valve Prolapse
This article is written for physicians and is a bit technical, but is an accurate rendition of current thought on MVP as supported by scientific study.

Freed et al. on the actual prevalence of MVP
This is an abstract of the 1999 landmark article in the New England Journal of Medicine that should change much of the thinking on MVP within the medical community, and an accompanying editorial.

Lack of association of MVP with stroke
Also from the New England Journal in 1999, with accompanying editorial .

NHLBI press release on MVP
The National Heart, Lung and Blood Institute responds to recent data on MVP

Chronic fatigue syndrome
Check this About.com site for extensive coverage of CFS, a condition often dismissed as "MVP"