(Q1) Multiplayer is laggy or extremely choppy.
(A1) The server should have its CONNECT RATE turned up to T1/LAN (in the Multiplayer Menu). Make sure your client connect rate is turned up as well.
(Q2) Daikatana doesn't work with a Voodoo2. (A2) There are two fixes for this: (1) edit your config file (in the DATA subdirectory) and change "opengl32" to "3dfxgl" or "3dfxvgl", (2) download and install the miniGL driver from http://www.3dfxgamers.com/view.asp?PAGE=V2drivers
(Q3) Running the DKDEMO.EXE on Windows 2000 gives you an error (Insert Disk 1) (A3) Use WINZIP to extract the DKDEMO.EXE file, then run the SETUP.EXE program to install the demo
(Q4) The game pauses for a long time when you're playing multiplayer (seems like a lockup) (A4) This is a bug in the demo only that occurs when you are attempting to connect to the Catacomb level (Greek time period). Just wait 20 seconds and you'll connect.
So far, these cover 99% of the problems that people are having. I'd like to say thanks to everyone who has been emailing me their raves and congrats -- thanks a lot, you guys make it all worth it.