The Twitter for blogs
Thinking about whether there is a way to beat Twitter with open standards. The day Twitter shut off RSS (so that people couldn't build apps that avoided their ads) we lost a huge function of it as a part of an aggregation system. However, tools like NewsBlur show it can still be scraped.
Spotify is trying to create a walled garden around podcasts. Again, shutting off the aggregation function.
Google Reader was very popular. With some additional tools to create self-hosted content, likes, and some additional discovery tools, it could have been a distributed twitter.
We may be able to do this.