They have journals here on Medhelp and you can set them to be read publicly, only by friends or privately. I've written what I feel comfortable here and what is appropriate detailing my recovery.
You can journal right here on Medhelp, you can make it private, or you can let people see it.
I just started journaling myself, at the suggestion of my therapist as well, and I am enjoying it. I am doing a written journal though. Hopefully I can track this craziness!