If you're interested in downloading the entire set of WPF samples for the Beta2 release of the SDK, they're available as a stand-alone download at this URL:
Be forewarned, it's a 91 megabyte download, so go make some coffee and come back in a few minutes unless you've got a ton of bandwidth.
If you have any problems or issues compiling any samples, please feel free to post to this entry and we'll help out. Have fun.
We are the Windows Presentation Foundation SDK writers and editors.