For reference, the old Atlas Games Delphi forum's read-only archive can be found at atlas-games.com/forumARCHIVE/index.html. Many basic questions about Unknown Armies may already be answered there.
Also, these links may be of interest:
Official Unknown Armies webpage - atlas-games.com/unknownarmies/index.php
Unknown Armies FAQ - atlas-games.com/unknownarmies/uafaq.php