Yes, that's part of it.
I highly, highly ENCOURAGE people to keep a journal of their experiences.
I equally as highly DISCOURAGE USAF officers from putting that journal on the internet.
No good can come from it. Seriously.
To the OP....dude, I did this 10 years ago and, although I recieved a lot of feedback that it was helpful to many people (to this day guys I don't know still see my name tag and say "thanks for writing that journal!"), in the end it was nothing but a headache for me. If you want to know the specifics, shoot me an email or PM and I'll give you the lowdown.
Bottom line is this: You're not doing something unique -- literally dozens and dozens of other guys have "blogged" their UPT experience, even before there was such a thing as a blog! -- and as a military officer you are putting yourself and your family at risk by having so much personal data about yourself (and your profession) on the internet.
Keep a written record of it for yourself -- you will thank yourself in 10 or 20 years when you are able to go back and refresh old memories that have faded and emotions that have long since disappeared. If you want to share that with your family and friends, distribute it via private channels.
As far as the callsign goes....well, this website is certainly part of it, but the whole ordeal is a story best told over a bartop and liberal amounts of Jack and Coke.