This is after reading about Instapaper everywhere and hearing from close friends that it's almost the main reason they even have an iPhone (which was probably an overstatement on their part).
Edit: Can we please stop the tired argument of "you paid 600$+ for the device, what difference is 5.00$..."?
It's like people who pay 6000$ for a HDTV don't mind paying 100$ for the HDMI cable. Some people do indeed do that, but I for one determine the value of an app or accessory based on the sunken costs of the device. I value a HDMI cable's value at about 5-10$ because that is the cost of a quality one from Monoprice.