Aliguana ar Foursquare, a pham na fydd yn ei ddefnyddio http://marilwyd.blogspot.com/2010/03/why-foursquare-isnt-for-me.html
A sylwadau diddorol ar y gofnod hon hefyd, os da chi isio mwy o pros a cons: http://scobleizer.com/2010/03/10/check-in-on-this-can-location-based-services-get-any-hotter/
Barnau eraill http://thenextweb.com/location/2010/03/23/sxsw-location-wars-meant/ http://thenextweb.com/location/2010/03/23/everything-will-be-a-feature-of-location/
A sylwadau diddorol ar y gofnod hon hefyd, os da chi isio mwy o pros a cons: http://scobleizer.com/2010/03/10/check-in-on-this-can-location-based-services-get-any-hotter/
Barnau eraill
http://thenextweb.com/location/2010/03/23/sxsw-location-wars-meant/
http://thenextweb.com/location/2010/03/23/everything-will-be-a-feature-of-location/