Came across a very useful wiki called MediaOnTwitter. This wiki contains the a list of the reporters, journalists, and bloggers on Twitter. You can use this wiki in two ways:

1. Finding people worth following.

2. Getting in touch with reporters, journalists, and bloggers to pitch.

Two other useful sources of information about Twitter are:

1. Twitter@alltop.com--aggregation of news about Twitter.

2. Twitterati@alltop--compilation of the last five tweets of the Twitter elite.