Presence of a link on the following list does not constitute endorsement or even 'vague approval' for the content of the linked site.
The MUD-style massively-multiplayer online game in which Cwn Annwn is a clan.
Alyria Online contains a wealth of information relating to Materia Magica, including trainers, scroll locations, skills, and maps. Has a message board which used to be very popular; particularly, you may be interested to find scripts written by players over the years. Sort of outdated but some pages may still be useful.
Idiot's Guide to Materia Magica. Although outdated, it still includes useful information for new players to Materia Magica. After a long hiatus, IGTMM is now being updated again.
Knights of Chaos
Contains many useful guides, including guides to some high level runs. Also some fun extras.
A clan website with area maps, guides to specific aspects of the game (feature: that cool botany PDF), guides for players of different level ranges, and other useful information.
This site contains art galleries, the Pysch Ward (clan talk logs), and other information relating to clan Spiritwalk.
Lantis's site, "Lantisite"
Mark walkthroughs and mini quest guides based on the personal game experiences of Lantis. Could be a useful read if you're stuck trying to figure something out.