Playtxt
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Playtxt is a mobile social software (MoSoSo) network that supports six degrees of separation. It was created in 2002 by Andrew Scott, a UK based entrepreneur. It is a mobile community with social networking functionality that can be utilised worldwide. A user can log his or her location anywhere on the globe from their mobile phone simply by entering a nearby town or city. Initially this was done using a text message (SMS). The network then uses a six degrees of separation algorithm to provide contact with friends of friends who may be physically nearby. The network is free to join but has a commercial element by charging users for some of its extra functionality.
192,872 places (towns, cities) worldwide, hierarchically sorted into 3527 regions from 238 countries projected back onto latitude and longitude including all regions. Names for places supported in 15 languages. The service supports SMS and mobile instant messenging via J2ME. The mobile IM client supports IM between playtxt users and most of the major IM chat networks including Yahoo, ICQ, Jabber, Google Talk, MSN Messenger and AOL.
playtxt social network official website
Wired.com - MoSoSos Not So So-So