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Motivation
Applications like Tracker, Strigi, and Beagle are great for indexing and searching the desktop. However, they could be better with a slick ajax front end. Pylons is a perfect candidate for this type of application because existing python bindings make it easy to tap into these search engine apis.
First Steps
Currently there is a project called tracker-client-pylons hosted at http://code.google.com/p/tracker-client-pylons/. This project aims to provide a web interface to tracker using pylons. This application could be expanded to provide web services and thus plugin to other applications. The project is very new and needs a couple of pylons developers to join.
Future
Xesam, http://www.xesam.org/main is a project with the purpose of providing a unified api for the various desktop search back ends. In the future as the various back ends implement the Xesam apis it would be nice if tracker-client-pylons could become xesam-client-pylons and provide unified web services for search.