TheyWorkForYou is the best political advocacy site I've ever seen: it scrapes the UK Parliamentary record and then turns the debates into an easily searched means of keep tabs on your MP — and to turn your MP's deeds into the basis for discussion and political activism. A common question from Americans, Canadians and others is how this system might be adapted for their respective governments.
Well, now the TheyWorkForYou team have released the source-code for their app under the GPL, and they're also publishing raw XML feeds of their data-sources for you to mix and munge.
Get busy!
(Thanks, Danny!)