Hi SiriusT and welcome!
-I too, am unsure if I will be able to hit the 150 mark by July, but I sure as heck am trying!! Right now I'm working out as much as I can tolerate (posted in my journal) 5-6 days/week with resistance training and walks thrown in whenever time and weather permit. I also follow Atkins.
-I am not weighing myself throughout April--on 3/31, I took my measurements and weight and will do so again May 1st.
-you can do daily posts or whatever you are comfortable with....as for statistics, maybe monthly stats? biweekly? Any suggestions that you have?

Good luck!!

-cher