For the past two days, I've been trying to recover data from a damaged hard drive. The drive got damaged when a squirrel was running along the above ground power lines, and caused an explosion when it shorted the circuit. This of course stopped the computer (and the entire neighborhood for that matter). And as occasionally happens in this type of circumstance, the drive was damaged. The partition with business data was no longer recognized - er, well, we could tell it was there, but couldn't mount it.
Lesson number one - make sure you have your data backed up.