There is a steam mop that I have had on my wishlist for quite some time. It's the
Sienna Luna Micro Pulse Steam Mop with UV Light. Everywhere I look this one has exceptionally good reviews. It has a vibrating mode where it shakes the dirt off your floors. Sort of like a sonic toothbrush in a way.
Here's the description of it:
"Sienna Luna Micro Pulse Steam Mop with UV Light
Cleaning's never fun, but this Luna steam cleaner makes the job go quicker and easier. Ground in dirt is no problem with three levels of micro pulse cleaning that let you dust, mop and scrub all types of sealed floors. There's also a dust sensor that highlights areas that need cleaning or that you might have missed. You have plenty to do around the house, let the Luna steam mop free up your day for lunch with friends."
This mop costs anywhere from about $100 to $150 depending on the accessories you buy with it. I plan on getting this Luna when my Shark dies.