Sick of not being able to search your the RSS feeds in your online/offline reader application? Download Squad (by way of Google Operating System) points out one very easy alternative to waiting day and night for search functionality to automagically appear in your favorite reader app: create a Google Co-Op personalized search engine by uploading your OPML file of subscribed feeds.
It’s simple! Just use your favorite RSS reader application to export an OPML list of your subscriptions. Then, create a personalized search engine at Google Co-Op. Once you’ve completed the setup, go into your search engine control panel and upload the OPML file that you downloaded in that first step.