It was less than a week ago that Apple finally got a serious challenge in the tablet computing industry from Amazon when it announced the release of the Kindle Fire.

Now, Apple is releasing the next iteration of its popular smartphone, a device that is surely aimed at keeping the Cupertino, Calif.,-based company a major player in the smartphone arena, despite recent reports that it is losing market share to devices running on Google’s Android software.

As is often the case with the launch of a new Apple product, Twitter users are already giving their takes on the new iPhone and whether or not they’ll be purchasing it. Some of that conversation is shown below.

What about you? Will you buy iPhone 4S? Any particular features that you’re especially excited about or disappointed over? Tell us in the comments or on Twitter using the hashtag #iphone.