(Source: nu.nl)
(Source: solv.nl)
(Source: mediapost.com)
(Source: techmeme.com)
Via Techmeme. See also TechCrunch: Facebook partnering with Gowalla and Foursquare for Places (via Techmeme) and GigaOm: Facebook launches Places with support of Foursquare and Gowalla (via Techmeme).
Via MediaPost: The future of Foursquare, local advertising.
Via Techmeme. See also MediaPost: Here! App automates social check-ins.