2022-08-14 UTC
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janbrasna1 checkin: after dodgeball and only days after 4sq, there was this "gowalla" back in the day (later acquired by fb and folded into fb places): https://thehistoryoftheweb.com/gowalla-foursquare-and-the-very-brief-history-of-the-location-wars/ (good read btw, includes e. g. more from dodgeball history, dating it back to 2000(?)) launching ahead of SWSX in MAR 2009 (not 2007 as mentioned by wikipedia; both 4sq and gowalla launched