And a couple of high profile ones at that:

Harvard Law Professor Charles Nesson uses it as a mood stabilizer.

"While Nesson experimented once with cocaine and tried LSD, he says he uses marijuana as a way to think creatively about his work, and also as a mood stabilizer. His father had depression and for a period of years was catatonic, Nesson says. While he says he has never fallen into a major depression, he believes - and at least one of his doctors has concurred - that only marijuana offers effective relief for his history of hypomania, or mild, manic behavior. "

(Link is being removed from the web - here is google cache [link|http://216.239.39.100/search?q=cache:zmRibFv9ui8C:www.lawschool100.com/nessonglobe.htm+Harvard+Nesson+marijuana&hl=en&ie=UTF-8|http://216.239.39.10...na&hl=en&ie=UTF-8])

And a Doctor Lester Grinspoon

"I was 44 years old in 1972 when I experienced my first marijuana high. Because I found it both useful and benign, I have used it ever since."

[link|http://www.cognitiveliberty.org/8jcl/8JCL83.htm|http://www.cognitive...g/8jcl/8JCL83.htm]