I have done some stuff in mainstream, although I like adult better, every now and then it is a nice change to do a mainstream gig. My buddy Randy from Kool Katz Media goes between adult and mainstream all the time.
His mainstream sample page
http://www.koolkatzmedia.com/index.php?useraction=demos
His adult sample page
http://www.koolkatzmedia.com/index.php?useraction=adult