A great friend of mine, artist Kristi Kennington, loves to take pictures with negative effects applied. Admittedly, I was a bit skeptical, preferring to take 'em the old-fashioned way...but after taking a few test shots of a few art pieces (not to mention her and a few of the studio cats)...I'm convinced!
Enjoy!
BTW: Her site is: kkss88.blogspot.com. Great art and ideas that will jump-start your mind!