I noticed that last week and went ahead and bought it. I've been on a free trial for almost four months now (got my first 30-day extension) with two more still to go (got the latest 60-day extension), but I didn't think I'd see it this low again.
Even though they've had their problems, I haven't had any of the really bad ones and things seem to be much smoother now, so I feel pretty confident using it (mainly the iDisk, but also some email) for my freelance work.