Not enough USB ports!

I have 3 USB ports on my G5 and 4 things that need to be powered directly off them (the keyboard; a DigiDesign M-Box; a Mackie Baby HUI; and a 4-port hub). How can I get this to work all at once? I’d rather not have to un-plug the 4-port hub every time I want to use the Mackie mixing board.
Suggestions?
Thanks!

<RANT>
I have been a strong advocate for more rear panel ports (fat lot of good it's done!) for years. USB expansion on Macs is terrible. I have a box full of PCI USB cards from Sonnet, Adaptec, Belkin, IO Gear, NEC, you name it. Red ones, yellow ones purple ones, big ones, small ones, 2 port cards, four port cards, five port cards....not one "works without issues". Some will allow the computer to sleep as long as nothing is connected to them. With others, the computer will not even boot. I could buy another Mac with what I've spent on these 'effing things. And don't give me that bull about the display and keyboard ports either. The display ports can be just as problematic as the expansion cards and the keyboard ports while convenient for things like a mouse or PowerMate, are low power and cannot support things like media card readers. The front port is very handy for temporary connections but who wants a cable sticking out of the front of their computer all the time?
All of this could be avoided by simply providing 4-6 rear panel ports like the other computers have. For what Apple charges for their machines, it would not, I am sure" break the bank".
</RANT>

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