November 5, 2004
In respect to my earlier post regarding Doubleclick banner ads, it seems that Doubleclick Flash banners are not actually scripted to grab the focus as at first thought.
Although the focus-grabbing behaviour does actually happen, the problem appears to be with iframes themselves and how the browser (in particular Internet Explorer on Windows) deals with them: if an iframe finishes loading after its parent loads, it seems to grab the focus.
Unfortunately this throws the use of iframes into question. Further investigation is still warranted, however it is something to remain aware of.