Charging Multiple iPods

Although I don’t own an iPod myself, and have no interest, someone asked this question recently:
I know there are several disticts utilizing iPods in the classroom. We are looking for an efficient way to charge multiple iPods. Any information would be appreciated.
While I didn’t find all the answers in 10 minutes of Googling, here is what I did find. Feel free to add more:
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ChargePod (7 devices)? http://tech.yahoo.com/blogs/hughes/12611 Est. Cost: $100
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Desktop Family Charging Station (3 devices) http://www.smarthomepro.com/50612.html
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Powered USB hub http://en.wikipedia.org/wiki/USB\_hub
Know of any other ways to handle charging multiple iPods in a classroom setting?