Connect self-powered USB storage devices?

[Steven **]

So, I know the USB port is a mini and it's unpowered. But...

Assuming there's a USB mini to full USB adapter, is there any reason
you couldn't connect the Neo to a USB hard drive?  Most (all) of the
USB hard drives I've seen had a external power supply.

On a related note, could an iPod be connected to the Neo?  It's
basically a battery powered hard drive!

-Steven