StarWars.com:
To commemorate the Star Wars Spectacular at the 2007 Rose Parade, Milestone products presents two collectible pins; a Stormtrooper 'Float Pin' and a George Lucas 'Grand Marshal' pin. Since 1985, Milestone has produced collectible pins representing every float building company, float participant, marching band, and the media connected to the Rose Parade. Check out the above link to StarWars.com for more information.