If it helps, I have been occasionally updating the WIKI page for Keyboard Controllers. This has not been "pretty-ified" and copied over into the main Docs menu like most of the other wikis. It is a work in progress that can help folks using an IPAC or other keyboard controller (or even GPIO) hit the ground running. Several of you have helped with the details. Check it out if yours is a controller that sends keystrokes.
I see a lot of Zero Delay usage, maybe because they are abundant, inexpensive, and relatively easy to setup. However, I don't know much about them. If we have an expert on them, we should setup a wiki page for this controller too.