This plan, and work already done, is fantastic!
I couldn't view /my-group/admin/ on your dev server though I signed up.
Do you plan to define layout solely with CSS and use no tables for that purpose? That would open up the possibility to supply several layouts for users to pick out of the OpenACS box (without using the skin package, is that obsolete?). Maybe it would be possible to attract people with design and css skills to create sitewide OpenACS CSS skins, something like what is going on at http://csszengarden.com/ . It's also a nice feature to offer each visitor to choose a layout, like at http://meyerweb.com/
