I have in my google reader over 171 bloggers remotely and directly connect with the topics around social networks and business communities I enjoy reading. Here are the top 3 (only one person’s perspective).
This is based on frequency, relevant, timeliness and useful”ness” of content.
These 3 over the last 3 months have the MOST number of starred and shared items in my google reader.
Highly recommend you grab a feed.