Bonus round!

Ignore the diff for this one, this is just a general question: 

Your application blows up overnight, and you've got more users than you know what to do with. They love your site, but suddenly you're running into Twitter's API rate-limiting, which is ruining the experience for a lot of your users. What approaches would you investigate to alleviate the rate-limiting issue, while still delivering all the features your users have fallen in love with?