Other than the feeling of 'sitting on a timebomb' are there any other specifics you can cite? Have you looked into contracting someone for a few hours a month to check/update things? I have considered doing what you have done, and your feedback has piqured my curiosity.
Not really. Just everyone smart I talk to says the same thing as everyone else in this thread: Don't do it. I'm not a sysadmin, I'm a developer who runs a company and doesn't even work in IT in my own company anymore. Bleh. So far so good, though....
