I’ve just spotted a great new Twitter search tool to find Twitter people by categories (Found via Mashable).
Twellow has already indexed 300,000 Twitter users into various categories (Including me!), with users replicated across all appropriate categories. For example, I’m the 96th most followed person in Marketing, but I also appear in Management, Advertising (hmmmmm?), News, Geeks and Blogging. All the main categories have appropriate sub-categories to find people more easily (Although there does seem to be Marketing as a category, and also a sub-category of Advertising).
And beyond browsing, you can also use specific search terms, including within specified categories.
Until now, your options were to find people within Twitter, hope to find people via keywords, or use Twitterpacks to find anyone that had manually listed themselves. Suddenly finding other people got a whole lot simpler.