I found this comment on the del.icio.us blog, on the post where Joshua announced the acquisition by Yahoo:
"Joshua, Congratulations! Yahoo sure does get tagging I see.
Posted by: Michael Arrington | Dec 9, 2005 1:58:14 PM"
Who really does "get" tagging though? Has tagging been monetized yet? Or is it just a feature of the web that we're all cuddly with now, a year an a half later?