Twitter has just suspended two third-party Twitter clients, UberTwitter and Twidroyd, for violating the company's policies and trademarks.According to a statement obtained by TechCrunch, Twitter explained the violations "include, but aren't limited to, a privacy issue with private Direct Messages longer than 140 characters, trademark infringement, and changing the content of users' Tweets in order to make money."Twitter added in the statement, "We've had conversations with UberMedia, the developer of these applications, about policy violations since April 2010, when they first launched under the name TweetUp - a term commonly used by Twitter users and a trademark violation.