Microsoft has released a significantly enhanced version of their Live Search API. Live Search API 2.0 offers increased flexibility in terms of API protocols (REST/XML and JSON are now offered, in addition to the original SOAP interface), new tools, sample code, and complete documentation.
If you subscribe to a lot of RSS feeds, you may find yourself wanting to view only a subset of the content. You can organize by folder, but sometimes searching the feeds is the quickest way to get at what you seek. A new service from Q-Sensei is now bringing that feed search power to your applications via its Q-Sensei FeedBooster API.