Best blog of this type I've seen was done by someone who gave FBSM.  She always kept it anonymous, never said who she was, the city she worked out of, or any specifics, which allowed her to be far more forthcoming and open about things.  She could describe both the good encounters and the bad, her reactions to different types of clients, and the 'inner workings' of the business.

Of course, if you just want to stay in touch with your clientele, and offer a little reason for guys to keep you in mind, then just set up a twitter account.  Post the typical playful banter, and a photo every now and then, and that should do the trick.