Thanks for letting me join the forums! To the ones who don't recognize me, you may find me e.g., at the duke4.net and pckf.com forums. I haven't been involved with Wolfenstein 3D and related as much as others, but I surely know this for long enough. What's weird is, as far as I recall, originally I encountered the Wolfenstein 3D as a modded Shareware release, much later (think ~8-10 years) revealed to be "Barneystein 3D" (just graphics and sounds are replaced, not the maps).
Eventually, though, I got access to original titles, and I'm surely familiar with these. In my case these include Wolfenstein 3D, Spear of Destiny (and the mission packs to a less extent), and also RTCW (to an even lesser extent as of now).
I'm afraid I won't post a lot, but then I also don't have great post rates other forums.
To finish, while not-exactly-Wolf3D-related, and I haven't really touched this for a month, I guess that I can link you to something I've recently been involved with (it's about Keen Dreams and the 3D Catacomb titles): http://www.pckf.com/viewtopic.php?t=3132