I have developed an app Birthday Postcards.
You are mostly welcome with any feedback!
Screenshots and description are below:
Lovely postcards, weekly updates - pick from lots of carefully selected pictures, add your text, and send via MMS, e-mail and more.
You can add your own pictures to this Birthday postcards app via Flickr. To do this, go to http://www.flickr.com/groups/shiny-postcards/ and join Shiny Postcards group.