Flip4Mac is now a Universal Binary. Although it is a closed beta there are some great guys out there that have provided links to download so you can have it even if you didn't sign up for the beta.
For those of you that don't know Flip4Mac is a plugin that allows you to play .wmv files through Quicktime. Microsoft now supports it as its official way to play .wmv files on Macs ever since they cut Windows Media Player support for Macs.
Eventually, Flip4Mac will be released for real and of course for free but if you wish then go ahead and download. I chose to download it because I have been waiting for it for so long and I hate having Windows Media Player on my Mac.
It works great for me and I haven't experienced any difficulties.
Another link just in case the previous one doesn't work.