Marketing Pilgrim recently posted a great list of marketing gurus on twitter who you may want to follow.
I totally agree with Brian, that conversations and topics can sometimes come up and get discussed well before they hit the blogosphere.
I was happy to learn that I made the initial 75 people on the list 
The best part is that I found out about the list at MP via Dan Zarrella’s blog which I found via another link all via Twitter!
You can use this cool tool from SEOcracy to bulk add if you want.
February 21, 2008
Marketing.fm, Social Networking