I stopped paying attention for a day and Google came around to declare the site as spam! Many of you have probably seen the warning. I can assure you that the site never hosted any malware, badware or spam. After some investigation I traced the problem to approx. 5,000 tags that were not associated with posts. Those had to have been left over from the spam posts that I cleaned up in December.
I have no idea why Google decided to look at those now and declare them bad. Any way… I’ve cleaned the problem up and things should be back to normal within a few hours.