I think I just had, to use Sam's term, a duh-piphany. Let me explain. Michelle's comments here in response to the recent pair of articles claiming that blogging will hurt one's career ("the mere act of opening up could cost you a job") made me think all of a sudden about what Mike has been saying about personal writing, and I finally put my finger on something. I'm sure it's blindingly obvious to the rest of you, but here's my new understanding: Due in part to blogging and other kinds of quickly, easily, and widely disseminative self-publication that the internet makes possible, as well as a complex confluence of factors in the social and political milieu (shifting notions of public/private, to offer one example), and the market (imaginary rather than material capital, middle class' living paycheck to paycheck, carrying debt, depending more on the market's caprice*) the context and meaning of personal writing have changed. "The personal" is becoming a site of struggle. To put it another way, "opening up" is set in opposition to "corporate values,"** and I'll admit that "the demonization of the personal" is a strong phrase, but judging from the articles in the Chronicle (and the subsequent forum discussion) and The New York Times, the personal is obviously seen by a lot of people as being to a considerable extent verboten.
So "the personal," in composition theory, can be conceptualized in terms of rights, as something at stake to which students have a right, a right that they should exercise. In the current context, I think one could make a persuasive case for this.
Viewed in this manner, any personal writing, regardless of subject matter, is political precisely because of its status as "the personal," which is in a very dramatic political and economic sense being called into question.
* Not to say that living hand-to-mouth is anything new. I'm probably way off on this point. I'm thinking of stories like Prof. B.'s, just to provide a reference.
** Edited to clarify: not just "corporate values," but one's status or potential status as a producer, one's means to make a living, as well as the right to express publicly an identity other than "worker."