PHP Script to generate RSS from blogs

Here is an Example Let's Say the keyword is "Kobe Bryant" The script should go out to Google and do a BlogSearch for the keyword on <[login to view URL]> and return results (Results should be sorted by post time) Then the script should hit each of the results page looking for the RSS feed for the blog (i.e. <link rel="alternate" type="application/rss+xml" title="CelticsBlog" href="/rss/ " />) For each of the pages it should find the individual RSS articles that mention the keyword and return those elements Requirements: 1. Must be able to accept muti word keywords and return exact matches 2. Must cache results locally for a configurable number of minutes. 3. Must support proxy servers specified in a text file and be able to switch proxy servers if it gets unexpected results. (just for the Google Query)