I know of Google's Feed API : http://code.google.com/apis/ajaxfeeds/ http://code.google.com/apis/ajaxfeeds/ But AFAIK, this API doesn't offer to actually do th

I know of Google's Feed API : http://code.google.com/apis/ajaxfeeds/ http://code.google.com/apis/ajaxfeeds/ But AFAIK, this API doesn't offer to actually do the polling for you. In the end, you would still need to spend a lot on BW to guarantee you get the updates in a timely manner. Also, (and that goes with the previous point) they cache the results from feeds... which is really not what we want to ensure fast detection of updates.