Can the iMac G5 supports TWO USB 7-port Hubs??

Hi all, call me greedy but belive it or not, I am running out of USB ports!!
I have a Belkin 7-port USB 2.0 Powered Hub (with 2 ports pointing upbright) which serves me very well, but I am running out of ports, now that I am considering getting the new iPod nano.
Anyway, there are 3 ports behind the screen, now I have my Mighty Mouse, the Hub's USB cable and a HK Soundsticks attached.
I am thinking of getting another similar 7-port Hub, they are actually stackable, but of course I won't use all 7 ports fully on the 2nd new one.
Can the iMac supports and substain 2 USB hubs?? I have actually never seen anyone with more than 1 hub??
Thanks and cheers

I have two USB hubs attached to my iMac G5 - they are both self-powered (their own power supply); one is a USB 2 with 6 ports and a multi card reader built in and the other my old USB 1 with 4 ports. They are plugged into the rear of my iMac along with the printer. Everything else, including keyboard and mouse, are plugged into the hubs and I am using a total of 8 ports - and everything works. I don't know if that would change if they weren't self powered.
Hope this helps.

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