I tweet since 12 Nov 2008. My #first5 followers were @dgcampagna @JodiGrundig @DisneyMomAmber @jojoey and @mefries.
Jim joined on January 15, 2008 a full 10 months before me. Since we both joined months after the original launch of Twitter to the public on July, 2006, we can hardly be called early adopters.