Stylizer looks nice, but I’ve found over the years that using a graphical css tool actually adds an unnecessary additional step from moving things from graphical to text.
With the development of firebug we’ve stopped using any other css tools, and the frameworks are all nice, but again, over the years we’ve developed our own framework that doesn’t need us to ‘adapt’ things. it’s already set up in the way we intend to use it. We could do this with one of those grid systems, but as they didn’t really start getting popular until after we’d already gotten in our neat little rut I don’t see us moving away from the way we do it.
Heck I’d bet most of those grid and frameworks started out just like what we did, and most developers do. Build our own, and they expanded on it.
So, short story long, we use a framework we developed based on our style of layout. Then adds/changes are done about 95% in firebug.