We have published the VM download on the following link yesterday
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=8e709e2e-c9a1-4c7e-90d6-a52bcc8e5daf. So if you want to get started quickly – this is your option.
It’s optimal to run it on machine with 8GB RAM, Solid State Drive is advised for good performance. Windows Server 2008 R2 with Hyper-v is required.
Please pay close attention to the document “Setting up the Host Machine for the SharePoint 2010 Virtual Machines” included in the download. Not setting-up the network as advised will cause several services not starting and the PWA will not come up.
This image is based on the SharePoint 2010 Beta Base VM.