Airtime

Facebook Would Like to Sell You a Mobile Ad (All Things D)

LinkedIn’s Leaky Mobile App Has Access to Your Meeting Notes (NYT/Bits Blog)

Foursquare’s Luedorf Says Users Still in Focus, Over Revenue (Street Fight)

Jack Dorsey Backs Away from Twitter (SAI)

Groupon’s Evolution Is Hurting Facebook (But Helping Google) (Forbes)

Launch of Airtime Hobbled by Glitches (WSJ)