There has been this talk about Jaiku people moving over to Twitter. That's why I follow what people write about these two services. There is also the Swedish Bloggy.Se
Tweetminster and Tweet Congress - Where Twitter and Politics Meet: "Tweetminster and Tweet Congress - Where Twitter and Politics Meet. December 18, 2008 - 4:22 am PDT - by Stan Schroeder.
Tweetminster is one of those services which clearly shows why Twitter’s simplicity and versatility makes it the swiss knife of communication platforms. While the service itself might not be interesting to you if you’re not closely following British politics, the idea and the implementation are great.
Tweetminster, simply put, follows the UK political scene through Twitter. It helps you find all the UK politicians that are active on Twitter, but it also organizes these tweets in a wonderfuly useful way. You can check out which political party is the most active on Twitter, you can sort tweeters by constituency, and - if a politician is not active on Twitter - you can contact them directly from the site and try to convince them they should join the fun."