Groupon’s whale problem

I’ve long suspected that Groupon has a whale problem — that a lot of its revenue comes from a small number of customers. New research from ForeSee indicates that this may be the case.

Brooklyn’s Spotflux raises $1M to help users regain their privacy on the web

Concerns over privacy on the web seems to be reaching a boiling point, with federal agencies and legislators looking into the policies and practices of Facebook, Apple and Google. Today the Brooklyn based startup Spotflux is announcing a $1 million funding led by New Atlantic Ventures and taking the beta label off its product in time for SXSW. And if you had any doubt about what a hot button issue privacy has become, Spotflux is currently leading the voting in the SXSW people’s choice awards.

Bankrupt Bitcoin exchange Tradehill suing red hot payment startup Dwolla for $2M

One of the reasons that small startup are loathe to announce big funding rounds is that plaintifs and patent trolls always come out of the woodwork. Payment startup Dwolla, which recently closed a $5 million round of funding led by Union Square Ventures, is now defending itself against a $2 million lawsuit from defunct Bitcoin exchange Tradehill, as first reported yesterday by Betabeat.

Square rolls out sleek new design for credit card readers in NYC taxi cabs

We’ve reported on how Jack Dorsey has been able to fulfill his lifelong love affair with dispatch systems by having credit card readers from his company, Square, installed in the back of 30 NYC taxi cabs. It’s part of a pilot program the city hopes will drive down fees. Today the company showed off its new custom design for NY cabbies: an iPad encased in black metal with a vertical slot for swiping credit cards. You can see it above.