Microsoft have just announced the SSE (Simple Sharing Extensions), which is an implementation of two way item-sharing like a bidirectional RSS.
Simple Sharing extends the Really Simple Syndication (RSS) 2.0 and Outline Processor Markup Language (OPML) 1.0 specifications.
SSE (which was released under Creative Commons!) is particularly useful for scenarios in which there are multiple updates. For example, SSE could be used to share your work calendar with your spouse — either of you could enter new appointments, even if not currently connected.
More infos at the Simple Sharing Extensions FAQs.
Simple Sharing extends the Really Simple Syndication (RSS) 2.0 and Outline Processor Markup Language (OPML) 1.0 specifications.
SSE (which was released under Creative Commons!) is particularly useful for scenarios in which there are multiple updates. For example, SSE could be used to share your work calendar with your spouse — either of you could enter new appointments, even if not currently connected.
More infos at the Simple Sharing Extensions FAQs.
As he mentioned,"the masterstroke is that SSE rides inside RSS. The massive collection of feed readers [...] doesn't have to change a whit to deal with SSE markup that appears inside an RSS feed. This gives SSE feeds backwards compatibility and a piggyback ride on top of the almost omnipresent world-wide RSS infrastructure."