Google announced Labs for Google Apps — a set of experimental features available free to businesses and schools. The first set are derived from tools Google uses internally and can be installed easily from the Google Solutions Marketplace by Google Apps domain administrators.  Once installed (see walkthrough), users on your domain will be able to log in and access these features alongside existing applications like Gmail and Sites, and your domain administrators can configure them using the standard Google Apps control panel.

The new experimental features are:

• Google Moderator: Take Q&A to a whole new level -- manage feedback from the smallest video conference to the largest all-hands company meeting.  Learn more

• Google Code Reviews: Collaborate with others to catch bugs in software changes before you check them in. Learn more
• Google Short Links: Create easy-to-remember links for both your internal and external web pages Learn more