This is going to be mostly theorists, and the topics listed were the ones they'll most likely want to talk about. I personally would have left out strings because it isn't physics :)
We were able to start with several dozen forums because there was an "instant" population of over 100. If you have only a dozen, then 15 forums might be too many. I see web-forum sites for things from time to time and so many of them have empty forums - that probably looked like a good idea at the outset - because there just ain't enough regulars.
Wade.
Is it enough to love Is it enough to breathe Somebody rip my heart out And leave me here to bleed
Is it enough to die Somebody save my life I'd rather be Anything but Ordinary Please