There are several features in the new Android 4.1/Jelly Bean OS from Google to get excited about. For some users, the ability to get new content, like magazines and TV shows might be one of them. If you are one of the folks that wants to take advantage of this cool new feature in the Google Play Store, but don't want to wait to get Jelly Bean on your Android device, then this little download might be for you. One of our users, Exalted911, found a cool download that allows you to replace your current Google Play Store with the Jelly Bean version. We want to give you a quick warning that there are no reported problems with it, but you should still use at your own risk.
One of our moderators, justin82, found his thread and shared it with the news team. Head over to the link below to find a download link. Thanks guys!
Source: Replace your google playstore with the new jelly bean playstore.