With Apple’s integration of Siri into iPhone 4S, the Siri app is no more.
That’s unfortunate, albeit understandable. Siri was a great application, and in some ways is still more powerful than Apple’s integrated Siri. Siri-the-app made it dead-simple to make reservations at restaurants, among other things, and it doesn’t seem like that made the jump (for now, at least). Too bad, I loved using it for that.