Relevant link on modeless interaction on the web pulling from the apple human interface guidelines:
http://developer.apple.com/internet/webcontent/hideshow_layer.htmlSomething along these lines would be nice for this package.
Example adapted from the guideline: popups when you mouseover a link (e.g. [i] or [?] or [help] with rollover popups that are also clickable links in case the browser doesn't support the rollover or javascript is deactivated).
