Just picked up my Harbor Freight "multifunction power tool" today--for $35 w/coupon. In honor of the tool it's a clone of, I'm going to call it the Harbor-Master.
Saw the new models there, which are going for $49. They have variable speed, and I understand that they've improved the mounting system so that the little nubs don't wear down so fast. But I'm looking forward to using mine soon (have a job where I need to open up some plaster walls). It seems to be well and solidly built.
I did pick up a couple extra blades, including a carbide and a diamond one. We'll see how it does.