Street Fight Daily: 10.18.11

A roundup of today’s big stories in hyperlocal media, technology, advertising and startups.

New York state tax administrators have concluded merchants should collect sales tax on the full face value of items purchased with vouchers from Groupon, LivingSocial and other Internet discount deal sites —if the vouchers are for a specific dollar amount. (Forbes)

New York City’s Gothamist is thriving with an average 2 million unique visitors each month reading its eclectic brand of voice-forward reporting and aggregation geared to the young and well-heeled. Its success has allowed it to spin off sister sites across the country and around the globe. (NetNewsCheck)

How did so many Wall Street firms desperate to underwrite the Groupon I.P.O. miss the warning signs when pitching such a sky-high valuation? Or did they just turn a blind eye? (New York Times/DealBook)

Google expanded its Google Wallet push Monday, adding new coupon and loyalty card services to its mobile payments product as well as a few new retailers hoping to make it easier for customers to spend money. (PaidContent)

For users, foursquare unlocks their city and makes the world a more interesting place. But for businesses, foursquare offers a powerful new marketing tool that helps attract, reward, and engage customers in ways that were never possible. (Forbes)

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