I tried downloading Orcas from: http://www.microsoft.com/downloads/details.aspx?FamilyID=5d9c6b2d-439c-4ec2-8e24-b7d9ff6a2ab2&DisplayLang=en but part 5 seems to be corrupt.
If you know of a workaround or a place to get part 5 please email me at firstname.lastname@example.org and I will post it here to help others download it as well.
For now, I am trying out the express edition at: http://msdn.microsoft.com/vstudio/express/future/default.aspx
I am actually trying to play with SilverLight so I am hoping that the Web Developer version works with it.
Please pass this on to all the Orcas developers you know. For more information or if you have any tips, tricks, events that you think other Orcas developers would benefit from, please email me at email@example.com