In case you missed it:
The New York Times featured a great article (Sorting Out Coffee’s Contradictions) summarizing & discussing some Caffeine Myths. Not the usual here-say claims or rumors but study results with thousands of participants. Risks discussed are:
Hydration
Heart disease
Hypertension
Cancer
Bone loss
Weight loss
Without taking away to much: there is surprisingly little connection between caffeine and these health risks.
The article finishes with a section about health benefits of caffeine - especially for Parkinson's disease and Type 2 diabetes.