Have there been any notable promotional campaigns for the Bitcoin project or some of the major Bitcoin-relatd websites?
2 Answers
There has been a bitcoin billboard on the Lawrence Expressway in Silicon Valley, California, paid for by memmorydealers.com.
Also the same company paid for a radio advertisement across a number of US radio stations I believe.
Mt.Gox donated over 4000$ to Humble Indie Bundle 3. Whereas it wasn't a direct campaign for Bitcoins, it got noticed in a few places helping to promote the currency's image.