In article , Garner Miller
wrote:

Capacity
- 4GB, 15GB, 20GB or 40GB hard disk drive
- Holds 1,000, 3,700, 5,000 or 10,000 songs in 128-Kbps AAC format
- Stores data via FireWire or USB 2.0 hard drive

the 4Gb model is the new "mini-iPod". It is slightly smaller than the
15/20/40 Gb iPods, comes in different colors, and is the lowest priced
of the models.