Want to impress your loved one with a Valentine's card tomorrow? Why not sending her/him a Silverlight Valentines? Silverlight and Windows Live teams created this card template for you to modify it and share your love. The process only takes four steps - you can pick a photo from either Windows Live Spaces or Flickr, enter a short text or poem, choose accompanying music and send the card.
A cool example of integrating other services with Silverlight... Just the right one to end up on CodePlex or MSDN Code Gallery someday ;)