We'd love to know what you might need as far as code generation.
I think by far the most time consuming (and frustrating) part of "easy" web design, at least for me, is getting the floats, clears, block vs inline, etc. stuff working perfectly without resorting to absolute positioning or other shortcuts.
If I could quickly throw together a page layout - navbar on top, image on left on main box, text lined up on right, etc. define a few properties (fluid vs fixed width), this element centered, that element indented, etc. and quickly get a working page layout system in place, that could save people hours. I'd pay for that in a heartbeat.
Like I said, I know this isn't an easy problem to solve and I like the idea of getting the per-element / style code generation done first, but do keep this in the back of your minds. Keep it up!