According to product details on Google Play (the picture above), Samsung Galaxy Nexus HSPA+ is the latest smartphone from Google and it will be the first phone to run Android 4.1 Jelly Bean. That confirms Jelly Bean as Android 4.1.
The information only appeared for a while. A person had added a Galaxy Nexus unlocked to the shopping cart on Google Play Store and read the description on check out page which said that Galaxy Nexus is the first smartphone running on Android 4.1 Jelly Bean.
If the information is true, it most likely that Google will announce Jelly Bean soon at Google I/O conference next week. Droid-Life also got small thumbnail of Galaxy Nexus on Google Play Store which showed transparent Google Search Bar.