Now for something a bit off the beaten path for this blog. A couple of years ago, during my enforced period of inactivity, I began a personal due diligence project that I mentioned in passing: Building a database of information on potential retirement spots. With California continuing its descent into a nanny state tax hell for both business and individuals, that information may get used sooner than later, so I've taken advantage of the current recuperation (which is going well) to revisit and update that database. I'm sure I'm not the only one engaged in such a thought process, so for those who are starting or in the middle of the job and find they way here through Google, here is an annotated list of some of the more generally applicable data sources that I've used, roughly sorted by category. General caveat: I am a spreadsheet-wielding, database wonk, computer scientist and systems analyst trained, libertarian venture capitalist and manager. The types of data and their application are biased accordingly. Season to taste.