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Re:Google launches Uber rival RideWith by chockablock on Monday July 06, 2015 @09:52AM (#9839043)
Yep--it seems more like a smartphone-enabled extension of the 'casual carpool' concept (http://sfcasualcarpool.com/)

[Edit: except you can set up rides the night before; see Haaretz link in my other comment.]

Re:Google launches Uber rival RideWith by eli on Monday July 06, 2015 @10:00AM (#9839084)
Or the similarly non-app-enabled Slug Lines in DC: http://www.slug-lines.com/