Sarah Lacy's long-awaited book on Web 2.0 is available for pre-order on Amazon.com. The title: Once You're Lucky, Twice You're Good: The Rebirth of Silicon Valley and the Rise of Web 2.0. It's due for release on May 15, which means we'll probably see copies circulating in late April. Future reviewers, let us save you the work of coming up with a kicker: Yes, the title practically begs for Lacy to announce a followup oeuvre to prove she, too, is more than just lucky.