http://techcrunch.com/2010/06/02/oexchange/

OExchange, a simple specification for URL-based content sharing on the Web, was introduced today by a number of online service providers and social networks. The open link-sharing protocol has gained support from Google, Microsoft, LinkedIn, Digg, Instapaper, StumbleUpon, Clearspring Technologies and a handful more.

TweetMeme Community Contributor posted about a year ago