CNET senior writer Daniel Terdiman says Second Life is rife with business opportunities. While researching his book The Entrepreneur's Guide to Second Life: Making Money in the Metaverse, he interviewed a whopping two dozenresidents who count on Second Life for their monthly income. His sage advice? "Only the cream of the crop is going to make that kind of money. Most people who do this successfully are going to find that it's not quite that lucrative." Terdiman doesn't mention this one, but we think there's an even more surefire way to make money off of Second Life: Write a book about it.