Twitter restricts you to 140 characters per tweet. But what if you don't use all of the 140 per tweet? What happens to all the leftover characters?

Inspired by AT&T's Rollover® Minutes, I whipped up a quick javascript widget that calculates your monthly Rollover® Tweets -- How many tweets you could write by using up the leftover characters from previous twitter messages? Simply enter your Twitter username and hit "Calculate", and you'll have an answer in a few minutes! (This is how it looks like for me.)

Developer Notes:
0. Twitter is a little flaky about reporting data, and I'm not doing a lot of exception handling; so if the script doesn't work, refresh/rerun! :P
1. What you see here is pure Crossdomain Javascript using JSONP -- there is no backend.
2. I only look at the latest 1000 tweets.
3. Formula: Sigma ( Floor(Leftover characters per month / 140) ) over the latest 1000 tweets.



Fine print: Rollover® is a trademark of AT&T. AT&T's lawyers are cute and look like teddy bears.