Well, it's not hard to just go through the list of products Google offers, and subtract the ones that don't have a business model around them.

For example, Google Earth does some actual business business, and probably makes a bit of cash selling pro versions and geospatial servers and services (haven't looked at the 10-k to be honest). Orkut, Sites, Knol, Chat, Wave, Scholar, etc. does not.

Some things like SketchUp are designed as loss leaders like Search to provide content to things that might have a decent revenue stream like Google Earth (except most of the paying users are probably not using the Sketchup Data).

But other, more expensive things like Chrome and Android have a link to making money that's very tenuous at best.

And we also already know that Search Ads account for 99% of Google's revenue stream. Subtract that out and we have a very good idea of where Google's other offerings are.