Microsoft announced the availability for SharePoint 2010 Beta 2
http://blogs.msdn.com/sharepoint/archive/2009/11/18/sharepoint-2010-public-beta-is-now-available-for-download.aspx
At the PDC in n Los Angeles, Scott Guthrie announced the availability of Silverlight 4 beta:
http://team.silverlight.net/announcement/silverlight-4-beta-is-now-available/
http://www.silverlight.net/getstarted/silverlight-4-beta/
Here are some Query String parameters that I think every SharePoint Developer\Implementer must know about it
To open the Web Part Maintenance Page
"?Contents=1"
To Open the Page in Web Part Design Mode
"?ToolPaneView=2"
To Open the Search Web Part Zone
"?ToolPaneView=3"
To open the Design Bar - Useful for pages in the Pages Library
"?DisplayMode=Design"
To turn on Web Part Zone Editing
"?ControlMode=Edit"
To Show the Shared version of a page
"?PageView=Shared"
To Show the Personal version of a page
"?PageView=Personal"
