Page is a not externally linkable
-- Google SEO News and Discussion
---- Google Sidewiki Comment Capability For Toolbar Users
ByronM - 7:08 pm on Sep 24, 2009 (gmt 0)Thread source:: http://www.webmasterworld.com/google/3994234.htm
I can't think of a single positive aspect of such system.. and yes, its been tried before in many ways, just not on the scale that google could do it.
Brought to you by WebmasterWorld: http://www.webmasterworld.com