Web2py default layouts certainly have come a long way since the (IMHO, quite awful :p ) fluorescent orange and black-green looks.
I do seem to miss some "best-practices" documentation about how to effectively apply themes to a web2py application. The downloadable themes do not always properly display the newer widgets (like sqlform.grid), leaving me (as a css nitwit) not much option but to use the default layout. Unlike web2py functionality, the css classes do not seem to be kept backward compatible (your layout won't be overwritten if you upgrade to a newer web2py, but if you want the newer features to render properly you may have to manually merge old layouts with newer layouts) <handwaving> I'm wondering if there aren't any WYSIWYM web layout solutions (what- you-see-is-what-you-mean, a web equivalent to LaTeX macros for printable documents), e.g. providing standardized css classes that all scaffolding applications/widgets/user views ought to restrict themselves to. Themes would also have to be implemented in terms of those standardized css classes, hopefully leading to a smoother theming experience. Approaches like the "ui" argument in sqlform.grid do not seem ideal to me. </handwaving>
