Vint Cerf, Google's Internet evangelist, really did invent the Internet. So we suppose it's okay for him to coast a little. But as with anyone with the word "evangelist" on his business card, we can't help but wonder what, exactly he does. A profile in the Times of London does little to clarify matters. Apparently Cerf worries about the security of Web browsers and operating systems — never mind that Google doesn't make browsers or operating systems. Cerf got his job by emailing Google CEO Eric Schmidt and asking if he needed any help. Schmidt replied, "Yes." We're thinking Schmidt might be wondering now if he should have been more specific — and if Cerf could be contributing to Google's little payroll problem.