Android 4.1.1 (Jelly Bean) Firmware Available for Huawei Ascend P1 (U9200)
That's right, Android 4.1 has been released for the Huawei Ascend P1.
There are two that I've found for you.
The first is an official beta release so is packaged in an update.app and dload folder for installation and is available here - U9200-1 (Android 4.1.1)V100R001CHNC00B508
The second is a rooted version so the .zip is installed from ClockWorkMod :)
available here - u9200_EMUI4.1_B508_ATX
Original thread and source (Also source of screenshots) is here - U9200/P1 ING ATX team latest official upgrade EmotionUI B508 flash package [JellyBean 4.1]