I was the 6,798,762nd person to join Twitter. (There are currently over 1.8 billion Twitter accounts.)
The first tweet was sent by co-founder Jack Dorsey on March 21, 2006. He was followed by 31 people who were likely friends and colleagues. Today he has 2.4 million followers.
Here's a cool article from back in the early days of Twitter if you're curious - written by co-founder Evan Williams. Originally, Twitter was a project from the Obvious Corp., founded by Dorsey, Williams and Biz Stone. I think. I actually didn't Google that - I could be talking out of my ass but I'm going to publish as is and hope I'm right. Live on the edge.
I have been on Twitter for over 83% of its existence, for longer than 99.9% of its other users.
I joined and tweeted for the first time on June 13, 2007. This is actually rather special to me because on June 13, 1992, I was Bat Mitzvah'd. On June 13, 1997 I graduated high school. And it was my Grandfather's birthday. June 13 is one of my favorite days.
This site is kinda cool (if not a little stalkery) -- get your own Twitter history here.
P.S. I think Jack Dorsey is kinda cute. Frankly, if for no other reason than he founded Twitter, Sqaure and is kind of a genius and is even a little douchey -- I think he's sexy. ;)