This became long enough to really be a post of its own.
I think blogging about one's job is not a very good idea. As a general principal, I tell funny stories about work or, more often, hanging out with my coworkers in the bar afterwards, but I don't talk about it in any serious sense.
Thant having been said, there are lots of ministers, anonymous and otherwise, who do a great job of talking about it without saying anything that could cause them trouble.
I think giving people pseudonyms or at least nicknames is only courtesy to them. "Boy, I had a great time getting smashed on Tuesday with Bippo. We didn't get home until 4 a.m." is a different sentence from "Boy, I had a great time getting smashed on Tuesday with my good friend Derek Maxfield, we didn't get home until 4 a.m." for example. Even if you're secure in your job, Derek might not be secure in his. (Especially if he made a big mistake at work on Wednesday)
When blogging about one's personal life, one also runs across these issues. That my brother goes on trial for statutory rape and possession of kiddie porn in two weeks is not a secret. It has been in the paper, after all. I do find writing a few posts about the effect the case has had on my family to be appropriate. I'm still sorting through these thing and hey, maybe they can even be helpful to somebody else.
But I don't want to be the sort of person who writes "Bippo and I had the biggest fight this week. He's such a moron, I don't know why I even hang out with the guy. Let me tell you how stupid he is..."