What's an f'd company? One that winds up on the infamous dotcom ''deadpool'' site F---edCompany.com. That's where Kaplan, using his nom de Net, Pud, chronicles the demise of the Internet economy with help from nearly 4 million monthly visitors, including journalists and CEOs. His eviscerations of the 150 companies in F'd Companies: Spectacular Dot-Com Flameouts point out such obvious shortcomings that you'll be amazed anyone ever invested in them (example: Flooz.com, which attempted to replace credit cards and cash with virtual ''Flooz'' bucks). You'll also wonder how a self-deprecating computer programmer who possesses all the expletive-filled charm of Joe Pesci in ''GoodFellas'' wrote a book that business-school grads will be reading in droves.