Apple released iTunes 4.5 late yesterday. They’ve also updated the iPod firmware to ‘take advantage of new features’ and improve playback performance.

Included in this version are following additional features:

• iMix: the ability to publish playlists to the world; to send it to your friends, and have others rate it.
• Support for unprotected Windows Media Files.
• The inclusion of a lossless encoder which is half the size usually taken up by raw AIFF.
• Party Shuffle: Shuffles songs from library or playlists which can be added to or deleted on the fly.
• Print Library or Playlist: As a list or as a jewel case. It can include images so that you can have nice covers too.
• A free downloadable single every Tuesday via iTMS (the iTunes Music Store).
• iTMS: Watch music videos for selected songs.
• iTMS: Radio charts. Appears to be US only.
• iTMS: Wish Lists.

Apple have also modified their Digital Rights Management for the iTMS: You can now only burn 7 CDs of the same playlist (used to be 10), but you can now authorise playback on 5 computers (up from 3).