Freelance Internet consultant Omer Pesquer came up with a neat online generator that allows you to generate fake cover art for a French novel using Flickr images; the site is likewise in French but just enter your name (or whatever you want as the author byline) in the box and hit go.
Here are some that I generated (and please be aware these are fake book covers, and do not represent any real novels of mine):
Trying to translate the titles made me realize how rusty my French is getting, but the images the generator produces are pretty neat. Aside from it being fun (as well as highly addictive) to see what pops up, a couple of the covers were so cool they actually gave me some new story ideas.
Added: I completely forgot to post a link back to The Generator Blog, which is where I swiped the link. Sorry, Gerard.