Daily Show correspondent Demetri Martin has signed a deal with Microsoft to appear in an upcoming campaign for the new Windows Vista system. Ten webisodes featuring Martin will play on the MSN site as part of the campaign. In September, Martin will release his new album, titled "These Are Jokes," with a 25-city stand-up tour to follow in October. Comedy Central will distribute the album and is also helping to launch the tour. Also, the comic will shoot a primetime special which is tentatively slated to air early next year. Microsoft will also be on board as a sponsor for both the tour and the upcoming television special.