Kudos to this guy who proposed in a helicopter:

http://www.youtube.com/watch?v=hkmqQh9FSvg

A bike ride to find a cure for MS, then a proposal to his girlfriend who was recently diagnosed:

http://www.youtube.com/watch?v=CcZlPmXXzX4&feature=PlayList&p=7B74F4690A256C99

Soldier proposes via video from overseas:

http://www.youtube.com/watch?v=pMPfV-RKHxU