You probably already know this, but Twitter allows users to download every tweet they ever tweeted.
While trying to search for an old tweet about the real sales numbers behind ebook revenue, I came across an article by Dave Larson. In the article, the author references a step-by-step guide by, Danny Sullivan, on how to download a users entire Twitter archive.
Who wants to download all those tweets? Not sure. But the download feature does allow a user to search every single tweet tweeted for that one unique tweet the user thought he or she tweeted but can not locate that specific tweet.
Anyway, the links to the articles are in the note section below. Enjoy the free info and be sure to tweet about it.
 “How To Search Old Tweets Until Twitter Lets You Download Yours” by Dave Larson, August 11, 2010: http://blog.tweetsmarter.com/twitter-search/10-ways-and-20-features-for-searching-old-tweets/
 “Step-By-Step: How To Download All Your Tweets With The New Twitter Archive Service” by Danny Sullivan, December 19, 2012: http://marketingland.com/soon-youll-be-able-to-keep-your-tweets-with-download-all-tweets-feature-29104