Members of the SoCal dev team posted an Android 4.1 Jelly Bean port for the mother of all Android devices, the HTC G1. Yes, the device that started it all is now rocking the latest Android OS. While it will never officially be loaded on the device, it is still fun to mess around with the project. This project is not for the feint-of-heart, though, as your device can easily be bricked. However, the SoCal team posted a guide to get going if you are up to it. Sadly, cell/data and screen rotation are not working on the device, but Wi-Fi, touchscreen, apps, and partially Google Now are all working. If you have a HTC G1 that it is just laying around on a desk shelf somewhere, why not try it? You can check out a video demo below: [XDA Developers, (2)]
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