Microsoft has launched a new app in their Zune store which is for facebook. Earlier in the November of 2009, Microsoft released Zune HD 4.3 firmware which added the support of 3D games and apps.

Unfortunately, this app faced certain technical issues according to CrunchGear and you may face some problems while installing it on your Zune.

Microsoft has this to say:

After launching the Facebook application for the Zune HD, we discovered a technical issue related to the API calls to Facebook which does not allow Zune users to view News Feed. The Facebook and Microsoft engineering teams are working together and hope to have a solution in the coming days

But despite of all these issues, this app is a major hit in the Zune marketplace and getting thousands of downloads daily. You can download this application from either Zune Market place or from the desktop client software on your PC. Make sure you have HD 4.3 firmware before installing the app.