Hi Lars,
No, I had not committed my changes to ad_form yet because I wanted to make sure they were working right, and to make them available for OpenACS 4.6.
I made a tar ball with all my changes, and everything one needs to get all of this to a stock OpenACS 4.6 tree. It includes your recent additions (which rock, btw), DanW's recent modification to ad_form (set form vars from edit_request block, which is also very nice), and support for -section attributes to ad_form (full README on my web site).
I also made screenshots, ad_form'ized your display-edit.tcl/adp, modified stardand-lars.adp to use CSS and to display multiple checkboxes in a better way.
It's all documented and available for download here: http://www.brasileiro.net/code/
I will be comitting the ad_form changes in a minute.
-Roberto