I called back immediately. The guy said he completed the data recovery and was pretty sure he got most of it. Of course, "most of it" scared me. He said to come over and he'd show me stuff. So, I got dressed, brushed the teeth, and was there in ten minutes. He hooked up the back up drive and took me through it, and we do believe - drum roll - that he got it all - all 560 gigs of it. I may have to download some apps and stuff, but since he got it all, I'm kind of hoping that maybe those are there, too. So, after six horror-filled days, I can, at long last, breathe a little easier. He'll now do the clean and reinstall, check everything, and says I can have it on Monday. I'll schedule a call with my senior tech for that day and he can help with anything if there's anything I need help with. Hallelujah!