This is an old post that I never published. The banner never trafficked, either. Pop-ups from standard banners are despised and not worth trying, in my opinion.
So we did this banner...
The client wanted to run it as a standard placement, not rich, but they wanted to have it load xml for its text, so that they could change it themselves. Okay no problem... just post a crossdomain on your server to allow Doubleclick to access your xml. My xml file was pipe delimited for line breaks.
Oh one more thing: we needed to have the clickthrough open in a 450x400 px window, no address bar or scrollbars... ok? This can be done in DFA, says the media guy. Days later: no dice. Scrapped.