Forget iOS 4.2, what you really want is Newton, Apple's original handheld OS, running on your iPhone and iPad, right? Well, if you're one of the many uber-passionate Newton faithful, you probably do and there's a project underway to make it a reality.
Einstein is an open-source project to run (via emulation) the Newton OS on modern hardware. It was written and released by Paul Guyot several years ago. It’s quite an amazing piece of work.
The project got a shot in the arm earlier this month when Matthias Melcher got it up and running on iOS and posted a video of himself running it on his iPhone. Being a Newton fan since my original MessagePad in 1993, it was quite a sight to see.
Matthias mentioned he didn’t have an iPad yet, so I grabbed the source and built it for my iPad so I could take a little movie and share
Right now it's slow and required a Newton ROM that can't be legally distributed outside Apple, but there's seldom a obstacle smart, dedicated developers can't hurdle to get cool stuff done.
If you've wanted your Newton to live on beyond the original hardware, check out the video after the break.