This is one of the questions I get asked most often. What I want to know, dear reader, is what you think?

A bit of context: Jonathan Schwartz, CEO of Sun Microsystems and the only public Fortune 500 CEO blogger, says he writes his own blog. He told AP reporter Rachel Konrad:

"The blog has become for me the single most effective vehicle to communicate to all of our constituencies - developers, media, analysts and shareholders," Schwartz said in an interview in his Silicon Valley office. "When I go out and have dinner with a key analyst on Wall Street or a key investor from Europe and ask them if they've read my blog, they almost universally say yes."

The quote is from her story titled Sun CEO among few chiefs who blog. It was widely distributed in dozens of newspapers over this past weekend. (I also got quoted in it, which was kinda fun.)

So is Jonathan an anomaly? Could or should CEOs of other Fortune 500 (or Fortune 50 or Fortune 1000) companies write their own blogs? If yes, why? (Authenticity? Efficient and powerful communication?)  If no, why not? (They don't have time; can't be transparent, enough, etc.) Jump in and add your thoughts below.