The Logic Off Topic list

I have a G4/450 which has 2 USB ports.  One port has the Apple Pro 
Keyboard connected (with a mouse and Logic dongle connected) and the 
other USB port has an emagic AMT8.  If I want to connect anymore USB 
devices (cradle for Palm Pilot or Handspring) I need a USB hub.  
Apple discourages putting a hub on the port where the keyboard is, 
but I'm wondering if putting a USB hub where the AMT8 is would effect 
midi timing?  

Thanks,
Mark