The 2nd Beta of the Office 2010 suite appeared on TechNet and MSDN last night.
Neowin.net is reporting that the public beta could be available this week after a tweet on the Office Twitter account, there is also a follow up post hints at possible social network integration in Outlook. This sounds interesting but I fail to see the point at present.
Those that have TechNet Plus and MSDN subscriptions feel free to download it now and have a play.
Below are a few screenshots
Word Excel PowerPoint