There's been a lot of questions about the new input system (referred to as "input-hotplug" or "i-h") that we've enabled in the latest X upload. Questions range from "how do I configure my keyboard now?" to "why are you making me install all this other stuff I didn't have before?" While the XSF has been dealing mainly with bug triage for the software itself, we've also been wanting some documentation on the system so people can understand it.
Thus was born our Input Hotplug Guide. The first portion of the doc explains the rationale behind input-hotplug and how it works. The second section is a HOWTO, explaining how to configure it. Hopefully this will answer some of the questions that are out there right now. So if you're curious or just plain frustrated with the changes happening to the X server's input subsystem I recommend that you check it out.