Here is a link by Volkan to some detailed information about the new Federated Search Provider capabilities. For persons who have data stored on multiple devices, Windows 7 Search is greatly improved through a new feature called Search Federation, which creates deeper connections with web services while fully taking advantage of familiar facilities built into Windows. Based on OpenSearch and the RSS format Search Federation allows you to easily add a location; these include multiple PCs, external hard drives, servers and even websites that you can search from within Windows.
You can download the Teching It Easy Search Provider HERE
Windows 7 introduces support for search federation to remote data stores using OpenSearch technologies. Federated search enables users to search remote data sources from within Windows Explorer and to interact with that remote data from within Windows Explorer.
This document describes how to build a web-based data source that can be searched using Windows federated search. Following the best practices described here, you can enable rich integration of your remote data sources with Windows Explorer without having to write or deploy Windows client-side code.
Windows 7 federated search supports the following standards:
For item data:
- RSS 2.0, 1.0, 0.91 & 0.92
- Atom 0.3 & 1.0
- MediaRSS content and thumbnail elements
For connection information:
- OpenSearch 1.1
- Basic (only over https)
- plus any other Security Support Providers installed on the client and the server hosting the web service