Today I connected my Mackie Onyx Satellite Firewire audio interface to my 2.4 Ghz 13" Macbook Pro for the first time. After it had been running for a while, I looked at iStat Pro, and it reported a CPU temperature of 67C, which is about 15 to 25 degrees hotter than this machine usually idles. Now I've looked around a little bit and found that it's a known issue and associated with the Agere Firewire chipsets. Is there any solution for this? Does it make a difference if you use a daisy chain setup with an external hard drive in between the computer and the audio interface, or a repeater cable, or anything of that nature?