with Web Designer 1.0 and new CTPs
For more info visit the MSDN "WPF/E" (codename) Dev Center.
WPF/E stands for Windows Presentation Foundation Everywhere and will allow you to distribute multiplatform WPF content on MAc, Linux and Windows. I am sure that some will code this as a Flash killer tehcnology, but I like to think that this is more of an option to let the WPF content creator to present hsi/her work on another platform as well. This is needed to make this technology to be viable on the Web. I think this is also an answer to the Web Video technology as Windows Media Player is too heavy for this kind of stuff. I am lookign forward to try this on my MAC and Windows machine at home.