Generates an RSS feed from any Twitter list, e.g. http://twitter.com/twitterapi/team (for some reason Twitter doesn't support RSS feeds for lists, although lists are in the API).
To use, pass in the list you want to generate a feed for via the listinput parameter. The listinput parameter should be of the form:
Pipe Web Address: http://pipes.yahoo.com/swinton/list2rss