i need some schooling on this.

i have a MBP with 3 FW ports.

all three are currently being used (Sound Card, External Drive and mouse) while i'm editing.

however, i also wanted to be able to plug in an external keyboard made specific for editing with shortcuts on the keys.

so i'm out of ports.

can i purchase a device that will let me add additional ports, or do i just buy the wireless keyboard to avoid this problem?

(all three items listed above need to be plugged in at all times.)