Del.icio.us Tags and Companies?

Looking for examples of marketers or companies that are using tags on del.icio.us to track the buzz around a product or service or collaborate on a project.

I am digging into tagging and could use some help. Has anyone heard of any good examples of marketers or companies that are using tags on del.icio.us to track the buzz around a product or service or to collaborate on a project?

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