Kmart - Logitech Portable iPod Speaker S125i - $29
From the catalogue:
*Play & charge any ipod model
*10 hours battery life
*2 year warranty.
It's showing up at about $45 - $50 everywhere else. Though it was over $70 @ Officeworks the other day but they've now dropped the price to compete with Kmart!
Here's the officeworks link:
These are meant to be quite a decent speaker for the price, there's a bass boost feature and can run on batteries so great for camping etc.