Download SharePoint 2010 Public Beta now
Today the public beta of Office 2010, SharePoint Server 2010, Visio 2010, Project 2010 and Office Web Apps is announced for customers and partners. You can download the beta at http://www.microsoft.com/2010. Or directly from your MSDN Subscribtion download page: http://msdn.microsoft.com/en-us/subscriptions/cc137115.aspx
If you didn't know already SharePoint 2010 (twenty-ten) is x64 only. If you are a favourite of Virtual PC 2007 you can't load x64 guest operation systems. Please use HyperV, VMWare or VirtualBox instead.
In 2010 we use new names:
WSS 4.0 = SharePoint Foundation 2010
MOSS = SharePoint Server 2010
14-hive = Root
SharePoint 2010 system requirements: http://technet.microsoft.com/en-us/library/cc262485(office.14).aspx