The way it works is
- Upload a picture (jpg, gif or a png file)
- add music or a song to it (an mp3 file > 20 mb)
- add your message and preview your card and
- send the card
What makes the service fun to use is the usability and the customization that one can do!
The service was launched about a week back and till date 3000 postcards have been created. The top 5 cities by usage are
2. New York
I would recommend the service as it gives a personal touch to your online greetings. This is the good thing about web 2.0 applications – they are useful!