Orcas March CTP is live !!!

download the virtual PC images from:
http://www.microsoft.com/downloads/details.aspx?FamilyID=b533619a-0008-4dd6-9ed1-47d482683c78&DisplayLang=en
 
or download the installer if you have a spare machine to install it on from:
http://www.microsoft.com/downloads/details.aspx?FamilyID=cf76fcba-07af-47ac-8822-4ad346210670&DisplayLang=en