There have been some recent improvements to the Google Analytics SDK. These improvements will strengthen capabilities for tracking mobile devices using GA.
The EasyTracking library is great for both iOS and Android mobile web development, and allows for easy tracking of your code down to the activity level. Very little coding is required to use the feature. Ultimately this update to the SDK means better responsiveness on iOS. The updates also contain bug fixes--making the service more reliable, which is good. Also, web developers will love the new open-source code made available with the recent release. You can find them at trunk/src/tracking/mobile on the Analytics Sample Code website.