Tweetagrams

Orange is running a lovely promotion called 'singing tweetgrams'. 

Here’s how it works..

1. You tweet your messages adding #singingtweetagrams from now 
   until Thursday
2. We pick the best ones as they come in, and send them straight to the studio 
3. The Rockabellas turn them into lovely little songs within a few hours
4. We'll let you know when your tweet is ready so you can come here and send it!

Excellent fun, personalized and very low latency response stuff - tweet and it's chosen and sung back to you in a few hours.

It's also interesting , to me, that you can take enter this promotion without visiting the website - identity is distributed, so are ideas.