Looking at using my Macbook Air with Garageband and/or Logic Pro. Coming from an iMac (which I no longer have), I no longer have the luxury of 4 or more direct USB ports (directly on the computer, as opposed to via a hub). Since the Air only has 2 USB ports, and I tend to want to use one for a USB wireless keyboard dongle, and the other for an external scratch drive, I find myself at least one port short (for plugging in my USB MIDI controller). I also occasionally make use of a USB mic. I'm wondering if attaching the controller via a third-party USB hub will have any adverse effect (latency, overall performance, etc). Anyone else have this dilemma and if so, what are your thoughts on the subject and how have you addressed it?