Samsung's messaging app ChatOn has expanded beyond Android, iPhone and iPad, BlackBerry, and Bada, and is now available for Windows Phone. Set to come pre-installed on the company's upcoming Omnia M handset, ChatOn users can send group messages, animated messages, and share multimedia files and calendars with people using the app, regardless of platform. Oddly, the Windows Phone version of ChatOn appears to be exclusive to Samsung devices like the Focus 2; download attempts with other phones or through the web will result in an error.