www.spirit-plumber.com

Here’s a stable build for the serial-port-enabled kernel, finally! Get it at

http://forum.xda-developers.com/showthread.php?p=4521020#post4521020

and play safe!

What does it do? It lets you use the serial port present in the G1 phone for custom applications. Such as, I don’t know, robots

The main change from the older one, other than “it’s easier to install” because it doesn’t need the SDK, is that the older one had issues with wifi and bluetooth occasionally. This one on the other hand Just Works with most Cupcake based firmwares, just install it on top of the firmware. Here’s a good one from another Italian developer.