Nexus S users think they're so cool with their built-in NFC chips, but now there's an easy hack that anyone can do to enable NFC Payments on an iPhone 4 (among others).
Most of you have probably encountered an NFC-enabled credit card. Most major US banks employ this tech in their credit/debit cards. There may even be one in your pocket without you knowing it! (Just look for the little sideways Wi-Fi signal sign in the corner). The hack involves taking one of these cards and cutting it to fit into an iPhone between the rear casing and the battery.
As more companies adopt the PayWave technology, this hack will get more and more useful. For now, you can impress 7-Eleven and McDonald's employees across the country with your fancy phone's newfound ability.