actually devices are made explicitly USB 2.0 compatible i would link you, but if you heard the name you would know what i am talking about. Sure it can be firewired with the correct adapter, however it can not be USB 1.1
iPod mini
Actually, I'll bet money that the iPod Mini works without any special handling, other than plugging it into the USB 1.1 port. Here's a couple of results of a simple Google search for you to chew on.
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Q: Does the iPod Work with USB 1.1?
A: Yes it does, though Apple does not recommend it. They do not give a reason other than the fact that it will be extremely slow. You should remember that the iPod will be active for much longer periods of time when uploading, so additional wear and tear (and possibly heat build up) could be the reason why Apple recommends against this. It is probably best therefore to upload small batches of files at a time to the iPod using a USB 1.1 connection.
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It works fine. I have a new mini and am using it with USB1.1. It is slower at transfering the songs but very useable. Also it charges the mini fine too. Welcome to the ipod Lounge and I hope you enjoy your new mini