Just like many of the new USB hub designs, the same thing goes for the USB-powered fans; there is still nothing indicating that the ideas for new and even weirder combos and designs would be slowing down.
The latest proof of that is this odd USB-powered Sailboat Cooling Fan with Speed Control. It measures 8.66 x 5.12 x 1.77 inches and can also run using 3 x AAA batteries. The product is available from the DealExtreme website for $8.64.