Build your own Vacation Auto-Responder App! Based on one of the most successful apps built for Twitter, we have taken all the work out of running your own Vacation Tweets Auto-Responder app website for Twitter users. It is scripted in PHP and integrates the Twitter API.
Thinking about creating a Twitter App that will help your users tweet out vacation messages to their followers?

demo:http://www.twitterscripts.net/demos/vacationtweets/