Bill's research into search engine algorithms and his scientific approach to the process has always inspired me. In a way, it probably encouraged me many years ago to base the entire SEO process on experimentation, testing, and identifying patterns. Bill didn't go away, he changed his form of existence, leaving an amazing legacy that will be studied and inspire others for years to come. I communicated with Bill the week before he passed away, and he said, "I'll let you know". And now he will probably let me know, not directly in conversation, but through the legacy he left us.