Oh Ole Kirk, please do not charge us for (slightly) examining this wickedness! Rather, Ole Kirk smite thy foes (aka clone brands) with thy bolts of creativity and quality!
Sorry, I wanted to post some sarcasm.
But if you guys want a good read, check this out: http://www.1000steine.com/brickset/miscellaneous/clonebrands.pdf It's a true AFOL reviewing some clone brand stuff and summarizing the whole deal. And it's funny.