For $30 everyone should.
I'd love to, but I have apps and plugins that aren't compatible yet so I'll have to wait a while. Not to mention users on older unsupported machines.
Life is tight on a resident budget (especially with a family), and you would be surprised how well a DP G5 Mac still runs :/
According to the release notes, 10.5 and G5 are supported. MR, would it be so hard to link to the release notes, or even post them in the story?
Macintosh Hardware
Mac computer with an Intel, PowerPC G5 or G4 processor
Intel, PowerPC G5 or 1.0GHz PowerPC G4 or faster processor is required to play Standard Definition video from the iTunes Store
2.0GHz Intel Core 2 Duo or faster processor is required to play HD video, an iTunes LP, or iTunes Extras from the iTunes Store
512MB of RAM; 1GB is required to play HD video, an iTunes LP, or iTunes Extras
Screen resolution of 1024x768 or greater; 1280x800 or greater is required to play an iTunes LP or iTunes Extras
Playing videos also requires at least 16MB of video RAM
Broadband Internet connection to use the iTunes Store
Apple combo drive or SuperDrive to create audio, MP3, or back-up CDs; some non-Apple CD-RW recorders may also work.
Apple SuperDrive to back up your library to DVDs; some non-Apple DVD-RW drives may also work.
Macintosh Software
Mac OS X version 10.5 or later
QuickTime 7.6 or later
Support for HE-AAC requires QuickTime 7.6.4 or later
Safari 4.0.3 or later
200MB of available disk space