There is a new kid on the Zune App store as of today. A Twitter application is available for the Zune HD which allows you to update and stay up-to-date via the application. Sadly, this and many apps are not available on older devices. The application offers everything you would expect from such application in a efficient manner.  The application is available for download now via the software marketplace and the device's WiFi.

For more information, visit the website.