Here's some photo's of the mess
Seems like the flood was caused by a faulty toilet lever that left the toilet running the entire time we were on vacation. It was running the whole time we were away. Since our house is on a septic system - I think the toilet eventually backed up because the septic was full. Not sure - in any case, the basement is a wreck. I immediately jumped online and checked out a few decent resources for how to clean up a basement flood - including this really good PDF from Washington County, Michigan. Meanwhile, my wife got on the phone with our insurance company. Once I had read through the PDF from Washington County, I headed out to Sunbelt Rentals and picked up a couple of blowers and a large shop vac and got to work right away on sucking out all the water.
The good news is that it looks like our insurance company is going to cover everything, even hire ServePro to come out to do all the restoration work. We do have a deductible of course, but I guess it pays to have good insurance because I don't think this is going to be cheap.
I returned the equipment to SunBelt after only a couple of hours (I had rented it for a week, thinking I would be doing everything myself), and they refunded me 100%.
Hopefully we'll have a good story to tell after we have a chance to talk with the ServePro people.