As we all know link building is one of the big factor for SEO and to one of my old email account I get loads of mails asking for link exchange on various industries. Btw, I have no idea how the email id has been spread out 
Link exchangers send their mails with information and criteria for reciprocal links. As Google buzz launched few days back, is based on a Gmail service that has a follow and unfollow system like twitter with a revolutionize in concept having an option to post comments to individual followers, showing liking to the buzz among the followers and emailing the buzz to desired people.
Through all these manner it will help link exchangers to post there reciprocal sites with information specific to their industry related followers and the work would be much more easier and sustained, compared to mass mail as of now 
Feel free to post your comments on how Google Buzz can be used.
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