As already mentioned, the Washington correspondent of Tages-Anzeiger, Martin Kilian, offers more freewheeling view on US politics in his weblog than in his print articles.
Also worth to mention:
Jean-Sébastien Chauvin weblog, film journalist (Cahiers du Cinéma etc.), and his colleagues and friends Sandrine, Moland Fengkov and Sébastien Bénédict.