I'm looking to pick up a set of soundsticks to use instead of buying an ipod docking system. I've read that they only have a USB interface though, is this correct? I'd really prefer something I can use with a standard stereo jack for a couple of reasons: I'd like to eventually get an ipod dock, which seems to come with a stereo jack on the back not a usb port (and I'd like to be able to plug my ipod directly into the speakers in the meantime); and because I'm running out of USB ports on my PB.