excerpt from traffikd.com:

“It seems like every day I see more and more being written about Twitter. I have to admit that I don’t really get the fascination with micro blogging, but it’s becoming more and more common, and many bloggers find the services to be extremely useful for connecting with their audience. With all of the information that I’ve been seeing on Twitter, I decided to put together this collection of resources.”

the list is at this URL/Link