Thanks everyone for the replies and links. While looking at all the different options that have recently come to light with your information, I have also been looking at stand-alone recording stations and have come to a realization about all of it. Unless you want to spend a bunch of money, you're hosed if you want more than two tracks to record to at a time. The only promising item in terms of cost ($500) that isn't even shipping is the Firewire 410 from M-Audio. Other than that, if you want to spend more money, you can go to the MOTU 828 ($750). Add that to some decent software ($300) plus a control surface with sliders and what not ($300) (personal preference - I can't get in the grove of sliding a mouse about on faders and knobs), I'm looking at (at least, to me) a bunch of money. Granted, it is cheap in comparision to what you could do with $1000 five years ago on recording equipment.
It looks like I am seriously looking at keeping my 4 track (which I can record to all four track simutaneously!) and just outputting one track at a time into my Powerbook onto different tracks for final mixdown in Logic or Cubase OR buying a standalone rig like the Tascam 788 ($600) which records SIX tracks at once and input my Powerbook doing sequenced tracks out of Reason onto a track of the Tascam.
All in all, it's been a long, confusing ride with all the options that are available. I've gotten to the point of information overload and sometimes think it would be better if I hadn't of looked down this path at all! Thanks again for your responses - very cool that there are a couple of Mac only audio sites out there!