I just noticed on the 8-12 nightly that when I set up a user account I could write php in my files (via, manage -> files). also noticed that on the theme chooser it gives the bit at the bottom about "...download themes and put them in your dir...." which ofcourse new users cant do... also the plugins menu, is it not possible to have it on for the main 'admin' blog but off for new blogs?
oh another neet thing I noticed, the new menu under ,site admin -> options, is cool indeed but when I edited the first line, to change site name it didnt stick. I hit the button, other changes stayed but it didnt....