You can actually get it to work on intel macs for the time being (and work 100%) while you wait for the universal version to come out. there are instructions on macosxhints.com, but basically:
download the installer.
go to applications>utilities>installer.app, go to its info and tell it to run under Rosseta--there's a check box.
run the flip4mac installer.
go to applications>utilities>installer.app, go to its info and tell it NOT to run under Rosseta--checkbox.
go to QuickTime.app and click on its info (cmd-I) and tell it to run under Rosseta--same checkbox.
thats it, all ur wmv, avi, etc will open and run under QT. QT will run as a Rosseta app but there is no visible performance decrease, and it's a perfectly happy work around until the company releases universal flip4mac; at which point, u'll just uninstall this one and tell QT to no longer run as Rosseta app.