My entire career has been dedicated to the belief that (i) people can do a better job of filtering the information that's available on the web than any algorithms; (ii) serendipitous discovery of information is often more compelling than structured information organized in channels; (iii) people are interested in learning about more topics than they're aware of or have time for but can only do so thru the findings of others. Twitter has proven these to be true on a massive scale.

In my opinion, Clipmarks offers a very compelling user experience outside of twitter and amplify is quickly becoming a compelling solution for users of twitter. the game is most certainly not over!