I came accross http://www.startup-review.com/ the other day.  The site is a collection of case study type reviews on successful web based startups – written by Nissan Gabbay of Silicon Valley VC firm, Sierra Ventures.
The site features weekly, in-depth case studies on successful (global) Internet start-ups. The companies profiled have achieved either: a) significant exits, b) large revenue, and/or c) strong Internet brands.
The site offers some great points of learning for anyone building a site, I particularly like the focus on finding and converting revenue streams.