From the Mini iPod Producer 
iPod gets little, as now you can have mini Ipod in your pocket. iPod mini lets you keep enough music(mp3) for couple of days in package so small you will forget you are look after it. People choosing iPod mini just because of its smaller size compared to the regular iPod. If you are planning to buy an iPod and choose iPod mini because its size, you may want to reconsider it.

iPod mini includes  a FireWire and a USB 2.0 cable for high-speed transfer from  Macintosh or Personal Computer. There is option to export your album from PC to iPod Mini in just minute. With the industry’s only true Auto-Sync, your iPod mini is always up-to-date, mirroring the latest changes you’ve made in iTunes. If your collection on your computer is bigger than iPod mini, you can let iTunes automatically choose a selection of songs to fill it up. The music player will ditch its hard drive and move entirely to solid state, flash media, a move that sources familiar with the new design say will shave 20 to 25 percent off the size of the unit.

 

The new iPod mini, which will probably be introduced at Apple Expo Paris on September 20, will be available in three capacities: 4GB, 6GB, and 8GB. The iPod mini will sport dual NAND flash memory chips to achieve those higher capacities, and Apple has already locked in for the rest of the year a majority of Samsung's new 4GB flash modules.

Also Sooner will be realised new mini iPod, it calles iPod nano. There is two color of it, black and wite. I believe the size of it will be even smaller than current mini iPod. The iPod nano will be available in 2GB or 4GB size.They say  iPod Nano cost expensive than iPod Mini, however there is new functions on the new iPod Nano, one of them is  - you can hang it on your neck.

4 GB (Hard Drive), 3.68 oz., Audio Files: MP3, WAV, AAC, MP3 VBR, AIFF. Display Size: 1.67 inch