Clone topix.net and netnewstracker.com/

I am interested in a project that would search sites selected by myself to search for a series of keywords that I get to generate that will bring back results and place them in a nice format like seen at topix.net. [login to view URL] is a site that gives limited exposure but does not give the flexibility. I need to get this information to display properly similar to topix.net...I need a nice database set up to handle and the ability to pick and choose stories that come into the system. It needs to search when I click on a button also.