because he is your client an anything can happen profressionally; if you were to mix it up he can one day decide to use the personal thing against you, among other possibilities. So I don't think you should

It's incredibly easy to set up filters on facebook. So if you add him, you can do that if you feel you don't want to share everything.

I have friends from work on mine, but no one I work with directly at the moment. Even then, I block most of them from seeing much of what's on my facebook.

This guy is married and trying to be "social" with you should tell you all you need to know about what his character is and wheather you need him as a "friend". Sounds like being chummy with this guy will sooner or later betray you as a co-worker and be career suicide if only by implications.

The more I hear about FB the more I think it is a bad idea.

While I think figureing ANYTHING you put on line anywhere is like broadcasting it to the world you want to be really careful if you have any reason to protect your privacy such as employment, owning your own business, or any significant relationship that could not stand the invasion of privacy such as school age kids, parents, a religious community now or in the future that might not understand things taken our of context.

I kind of think of myself as past all that and not giving a hoot about what people think about what I say but for some of you that still have career, romance, or personal goals that could get shot down I say err on the side of caution. Eating your own words is not a great dish even if you stand by whatever you have posted.

Some people are away too paranoid. I have friends who are married that are on facebook. I have old coworkers that are married that are on facebook. There has never been any issue with them at all.