Instapaper is for bookmarking and reading. It strips unnecessary clutter. You provide links to interesting stories - one might want to read them in a more readable format or send it to Instapaper and read it later on a tablet.

Here is my rumble: I'm thinking about an algorithm that would work like singnal-to-noise ratio detector. This requires a lot download bandwidth. It means counting how fast people like, +1, or any other on the internet (techcrunch, etc). Simply, replicating similar logic that HN uses for moving articles from newest page to the front page just for the top 10-20 most popular tech websites (techcrunch, gizmodo, etc). Then you add nice readability features (e.g., Instapaper) and you have a business. I might have a prototype next year but it seems that you have infrastructure that sets you ahead.