iPod Updater 2005-09-06 includes new iPod Software 1.0 for iPod nano. iPod Updater 2005-09-06 contains the same software versions as iPod Updater 2005-06-26 for all other iPod models.

With iPod nano Software 1.0 you can:
Listen to music and view album art
Browse your photo collection or view photo slideshows with music
Listen to audiobooks purchased from the iTunes Music Store or audible.com
Listen to podcasts, downloadable radio-style shows delivered over the internet
Store or back up files and other data, using iPod as an external disk
Store and synchronize contact, calendar, and to-do list information from your computer
Play games
Store notes
Add clocks for multiple time zones
Use stopwatch as you work out to track your overall time and your lap time
Lock your iPod Screen to prevent your iPod from being used by someone without your permission
http://www.apple.com/ipod/download/