It's not to blog or not to blog...but what/how to blog that's the question
Check out Kelly's Like You Care post on blogging.
"I bring this up because I had a passionate discussion with some people last night about blogging. One person from the group thought that blogging was not safe--people might know too much about you or misinterpret what you say. Her point was that without body language, inflection, etc., the ideas recorded would not be perceived correctly. Another person thought you shouldn't include any personal information on your blog because everyone has access to it. The gist of her argument was that generic information is"safe". It's not easily misconstrued."
Now, I'm pretty sure that I'm one of these people referred to here, but I'm not sure which one, because I wouldn't say that either of these threads were argued by me passionately at 1 a.m. when we were talking in the bar (Hi Dad!)....to me, it has more to do with judgement. Do I care that prospective/current employers know I drink beer and argue? Nope. But I do think about prospective/current employers reading the content of my blog posts, and I think others should think about that, too. So, to quote myself (which is freakin' weird...),
"if you're ready to stand behind the idea that whatever you say on your blog, you'd say to a prospective employer: then, absolutely...post on. My only concerns is that I shouldn't post something I don't want a prospective (or a current) employer to read. Because they might. And actually, we should be happy about that."