Not yet, although it's a great idea for an article. Revenue models is always an interesting topic although many startups might end up being a bit cagey about revealing their financials. I've been tempted to 'reveal all' for my own site before, although there is always a danger that when potential customers realise just how low budget things are, they might then be tempted to go to a more established competitor... just a thought.
Interested if anyone has any views on this. Could be a great opportunity to build better websites and applications faster, and with customers and users having more say...