The Alien Onions pointed at 100 Scope Notes, which has come up with a winning process, involving fake-name generating (to get your author name), random-word generating (to get your title), random-picture-related-to-random-word generating (to get your cover pic), and finally mucking about with the result to patch it all together and see if you can make it look like something you might see on the shelves.
(The process, if you wish to do it yourself - which you DO - is explained at both links above, where they have links to all the randomness sites and also to the rawther brilliant picture-mucking-about-with site, Picnik, where I whiled away
And here are my two efforts:
I had to think hard with 'Air' because I had expected to get some sort of ethereal cloud-type picture, and instead I got a bizarre Miami golf course thing. And thank goodness for picture-weirding effects, because really the image of a cute baby stick insect on someone's fingertip that came up for the word 'afraid' wasn't absolutely the scariest thing I could've imagined.
This was fun. Go do it.