Luckily, I've got a bunch of older Macs. A few hundred dollars later, I've got 2 up and running - so at least I'm able to work... barely.
This has been a real nightmare overall, though. I lost half a photoshoot DURING the shoot - the computer just erased the CF card and its all gone. Reshooting on Sunday, but its totally annoying.
So... Apple will replace my HD. But its going to cost a fortune (thousands) to try to recover info from my HD. It might not be worth it. 1500 to recover the old, or 500 for half a terabyte of back up? I haven't decided.