Google LEADSExplorer Marketing Leads Social Networks 
WebMarketCentral
DECEMBER 8, 2008
These services don't collect any information beyond what Google Analytics , WebTrends or other web analytics packages do. They can't identify the specific individual who visits a site, only the network location from which the visit originated. Critics of these services refer to them as "spyware," though that term isn't really fair.
Online Marketing Institute
JULY 31, 2009
For those needing more capabilities to help with sales enablement or account-based communication, I would add: 8) Sales/marketing portal or workspace — includes account spaces/threaded discussions, sales call/activity prep, libraries for marketing content, task lists. Social networking stuff fits here too.
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