Custom Newsfeeds

So I was looking to write an app that will filter the newsfeeds from a particular server based on
some text search and not inflict me information diarrohea. Additional filter critera can be added on a per server basis.

A simple use case: craigslist has a newfeed for craigslist s.f. bayarea | cars & trucks. Since we would like to brand ourselves as a speed-addict, we would only like to search for new carreras being posted. If I subscribe to this feed, then my feed reader app will download all the feeds being fed by this server which will include the likes of corollas, contours and what not. Now since these cas will not be good for our thrill seeking self-esteem, we would need to do better. So the requirement for our newfeed reader is to filter out those items not containing "carrera". 

Turns out this is already doable in craigslist. If you search for carrera in cars and trucks, the resulting RSS link at the bottom right already  achieves similar. But all sites are not as savvy as our craigslist brothers.

The next thing we want to do is use additional filter criteria, for example find carreras posted after 1-1-07, under 50K posted by private parties. This can be done using the form on the craigslist website, which means the information is available structurally, and not just as free text. Our newsfeed reader app should be able to make avail of this information.

Will write something over the weekend and see what I get.