The Myth Community has continued development on the games, particularly for Myth II:  Soulblighter.  Myth III didn't enjoy the popularity that the first two games had.

The Project Magma site has links for a multitude of downloads:

The main download page:
http://www.projectmagma.net/downloads/

The Myth II Version 1.6 Readme (which indicates it will run on Win2K at least in windowed mode):
http://www.projectmagma.net/downloads/myth2_16/Readme_1.6.0.pdf

Myth:  The Fallen Lords downloads including the Version 1.5 Patch:
http://www.projectmagma.net/downloads/tfl/

Project Magma Forum:
http://www.projectmagma.net/forum/

Recent updates have focused on OpenGL development, and naturally Glide has gone by the wayside.


The best site to get the answers to your questions is unfortunately offline at the moment (the admin is have Real Life issues):

http://www.playmyth.net/

Hopefully, it will return by the end of the month.