*Update 21st March 2014* On Twitter’s 8th birthday, Twitter launches first-tweets.com, where you can use it to find your first tweet! Just type in your @username, or that of anyone â your best pal, favorite comedian, a star or a president.
*Update 25th February 2013* It seems that Twitter has been rolling out the ability to download your Twitter Archive to most users already, I have created another tutorial for this feature, lesterchan.net/blog/2013/02/25/twitter-archive/.