user323: Have there been any notable promotional campaigns for the Bitcoin project or some of the major Bitcoin-relatd websites?

user323: 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.

user61: 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. 

323: <p>Have there been any notable promotional campaigns for the Bitcoin project or some of the major Bitcoin-relatd websites?</p>
 323: <p>Mt.Gox <a href="http://www.reddit.com/r/Bitcoin/comments/j6l7f/mtgox_donates_409600_to_the_humble_indie_bundle/" rel="nofollow">donated over 4000$</a> to <a href="http://www.humblebundle.com/" rel="nofollow">Humble Indie Bundle 3</a>. Whereas it wasn't a direct campaign for Bitcoins, it got noticed in a few places helping to promote the currency's image.</p>
 61: <p>There has been a bitcoin <a href="https://bitcointalk.org/index.php?topic=7961.msg170045#msg170045" rel="nofollow noreferrer">billboard</a> on the Lawrence Expressway in Silicon Valley, California, paid for by memmorydealers.com.
<img src="https://i.stack.imgur.com/ofxqi.jpg" alt="enter image description here"></p>

<p>Also the same company paid for a <a href="http://bitcoinmedia.com/how-to-get-bitcoins-with-cash-national-radio" rel="nofollow noreferrer">radio advertisement</a> across a number of US radio stations I believe. </p>
