Penelope Trunk's editor helps her improve her blogging and her tweeting:
In case you didn't know, I have an editor for my blog. This comes from being a columnist for so long. My editors were incredible—one was from Vanity Fair, one went on to the Harvard Business Review, and they definitely made me a better writer. So I have an editor for my blog, and if you think that's over the top, consider this: he also edits my Twitters. I mean, you can't write about sex and investors in the same 140-character phrase and still get funding unless you have an editor to save you from yourself.
What I've been doing while I've not been posting » Brazen Careerist by Penelope Trunk
Of course, she's a professional writer and she probably has a gazillion readers. =) But maybe small(er) fry like me might gain a lot from asking an editor what he or she would do to make this blog even awesomer... =) Someday!