For one, if you haven’t already done so, launch iTunes 10 to get iOS 4.1 for your iPhone or iPod Touch. This update brings some neat little additions to the iOS platform such as the ability to take HDR photos from within Apple’s camera application. Many people have already been noticing better images when using this feature. However, 4.1 also allows users to rent TV shows through iTunes, upload HD videos to YouTube, and gain access to Game Center.

As part of the iPhone OS 4.0, Apple has revealed folders, a new way to organize apps on your device. Now, if users drag an app on top of another, it will create a folder that takes on the name of that general category of apps. The folder can also be renamed, though, and can be placed in the Dock if you want. The best part about this new feature is that users will now be able to have 2,160 apps on their iPhone or iPod Touch instead of just 180. Why one would need that much is unknown to me, but you can now if you want to.

As one of the seven tent poles in Steve’s keynote today, Apple announced a new VOIP API. For VOIP applications, users will now be able to receive calls even if the application using the VOIP isn’t in the foreground. This means that applications like Skype will be able to use the double high status bar when on a call much like the actual phone. Furthermore, calls can also come through via a pop-up when you’re not in the application, allowing you to answer or ignore them.

As part of the iPhone OS 4.0 announcement today, Apple revealed Game Center. With 50,000 games and entertainment apps available on the store, Apple wanted to help make the experience using these games better. In a sentence, Game Center brings social networking to iPhone/iPod Touch games. Much as XBox Live does, Game Center will support the ability to invite friends to play against you as well as make matches for you using these games. It’s all done through Apple’s application, too.

This week Apple released both the operating system as well as its SDK for the 3.1.3 version of the iPhone software. The most interesting fix this update brings is more accurate battery level reporting, meaning you might actually see how much battery you actually have left, which is pretty important, if you ask me. To get it, simply launch iTunes with your device plugged in and click the check for updates button.

Setting aside all possibilites of whether there even is a new version of the iPhone software to be released later this month, Boy Genius Report has details on what it will entail. According to their sources, this update brings some exciting new information. For one, multi touch gestures will be OS-wide on the device. However, even more exciting is the possibility of a “few new ways” to run applications in the background (for those of you wondering, this means multitasking!).

Although the iPhone OS 2.1 update is not yet available, the iPod touch update was available shortly after Steve Jobs left the stage at the Let’s Rock event. While the iPhone update will supposedly fix major problems like dropped calls and application crashes, the update for iPod touch does not have such clearly defined goals.