I'm using the February CTP. Does Visual Studio (or will it in beta 2) provide a way to convert a page that was created without a master page to a content page? Sure it's easy enough to manually remove the html elements that aren't allowed in a content page, but a Layout-->Add Master Page command or something like that to remove the <html>, <head>, <body>, and <form> elements would be nice.
The Document Properties lists the MasterPageFile property, but just setting this property doesn't remove the extraneous elements. Thus, if you try to add a master page just by setting the MasterPageFile property doesn't work.
--D