Yammer update lets you preview Office and PDF attachments.

Yammer, the enterprise social network recently acquired by Microsoft, has been updated today. Among the features is the ability to view Word, Excel, PowerPoint and PDF attachments.

1.3.0.0 Update:
- Sign up for Yammer account from within the app
- Preview Word, Excel, PowerPoint & PDF attachments
- Support for higher resolutions
- Performance and security improvements
- Bug fixes including spellcheck