iTunes LP, Genius Sidebar, Home Sharing, HD TV support, iPhone support...
New in v9.x:
Resolves performance issue and issue with browsing iTunes Store (v9.0.1); iTunes LP feature (song lyrics, liner notes, album photos, and more), Home Sharing feature, redesigned iTunes Store, iTunes Extra, Genius Mixes, and improved syncing (v9.0); Release Notes - Last Updated: 10.30.09 (v9.0.2)
New in v8.2.x:
Compatibility with new iPod Shuffle, improved performance, AutoFill feature for manually managed iPods, enables CDs to be imported at the same sound quality as iTunes Plus (8.1.0.52); now seamlessly plays the current song when creating a new Genius playlist, improved checking for Apps Store updates, improved syncing for spoken menus to iPod nano, improved accessibility with VoiceOver, resolved problems with syncing Genius results to iPods (v8.0); Release Notes - Last Updated: 07.16.09 (v8.2.1.6)
New in v8.x:
Genius Sidebar with Genius Lists (playlists automatically generated based on your current music collection), support for HD TV shows (with Season Pass option), new Grid view layout for albums), new Visualizer feature, enhanced accessibility; Release Notes - Last Updated: 09.09.08 (v8.0.0.35)
New in v7.x: Support for iPhone and iPod touch (including fixes
for issues with the initial setup of the iPod touch on some international versions of Windows - v7.4.3), new video content support, iTunes U (free podcasts of University lectures), support for DRM-free songs - Last Updated: 08.01.08 (v7.7.1.11)
Pros: Huge media selection; easy to understand and use; store now features music files that may be used by other MP3 players; iPhone support, new video content support, and a new digital-rights policy make their debut in v7.3.x
Cons: Charges more for non-protected files; no support for non-iPod players; lacks flexible pricing plans; is it software — or just a mechanism to move iPods and make more sales?