The pretty_accessible_form plugin is a an attempt to implement A List Apart's "Prettier Accessible Forms" ( Prettier Accessible Forms – A List Apart ) as a form tag. You can read more about it at http://subvertingtheparadigm.ottercat.net/2007/5/18/pretty_accessible_form
The plugin can be downloaded from http://svn.ottercat.net/svn/plugins/trunk/pretty_accessible_form