I think Vince Briel was the first to create a hardware replica of the Apple 1. Apart from the actual Replica 1 you can find lots of information about the real Apple 1 on his site.
The Pom 1 is an Apple 1 emulator written in Java. Now you can even run Apple 1 programs without actually owning the hardware. However it can't beat the real thing, that's for sure!