ActiveScaffold is a great plugin to build edit form easily. Nicely AJAX and nested forms support (well with limits ;-). One thing which bugged me all the time, was the extra click you had to do to show the searchbox. Well I solved it like this:

[ruby]
def index
active_scaffold_config.list.label += render_to_string( :action => :search, :layout => false )
super
end
[/ruby]

I know, it’s kind of bad hack, as the label actually isn’t supposed to contain a form - but it works out quite well!