Anyone know of a free reliable method to auto respond to keyword strings from users posts ? I used to use a Yahoo Pipes setup which used a Twitter generated RSS feed for a search term then creating an output RSS feed which fed into TwitterFeed with the auto responses. I'm sure those who have looked into auto responders before know what I'm on about. However ever since Twitter seemingly closed off RSS feeds I've been looking for an alternative method and I'm drawing a blank ? Any ideas ? Or does anyone know how to get an RSS feed for a specific search string out of Twitter now ?