The following http://inventors.about.com/od/definations/g/Commerce.htm doesn't say anything new about "use in commerce", but it does give an "in practice" line. Seeing how advertising is seen as a form of commerce here, one could be led to believe that an announcement using official logos and/or other branded media could be a "bona fide use in commerce". Especially if said advertising merchandise and media is sent across state borders.
A quick google-session does also reveal there's some debate on how to interpret trademark law (http://blog.ericgoldman.org/archives/2008/04/trademark_use_i.htm). So we shouldn't feel bad about not really understanding it all, it's apparently not unusual
It would be real handy, though, if there were any law-school students or lawyers on these forums to assist us in our interpretations.
(tbh, I haven't read the second article completely, so it might be that the natural language barrier clouded my interpretation)