ReadWriteWeb

When Twitter COO, Dick Costolo announced on Monday that they were making some changes to their terms of service for developers, prohibiting third-party networks from advertising in users' streams, many in the tech industry initially reacted by saying that the move would spell the end of a number of startups who were providing exactly that service.

Twitter claims it made this move in order to preserve the quality of the user experience on the platform. But how does this announcement impact others working in the Twitter ecosystem?

When I called Twitter out in my post of the top 10 failures of 2009 for "failing to innovate," what I probably should have said was this: Twitter has done a decent job of implementing features that we first saw being used by third-party apps.

The concept of user lists? Sawhorse Media introduced those. Retweet functions? That was a user idea that had already been implemented formally by many mobile and desktop applications. And the hot Contributor API is something that CoTweet has been doing for a while. The geotagging API is hardly new, either. But instead of saying that Twitter failed to innovate, let's instead name a few features we love from third-party apps that we think they should integrate themselves - maybe with a key acquisition or two.

Google Chrome has begun taking submissions from third party developers. In a blog post written earlier today, Google is asking developers to contribute to the Chrome extensions gallery - an act that will put third party applications on both the Chrome browser and eventually the operating system.