Vault Network Boards - Still active message board for the Allegiance Community. - http://vnboards.ign.com/default.asp?cat=5010
The Allegiance Gateway - Contains Allegiance Authentication System, auto-update troubleshooting guide, and tool downloads. - http://www.alleg.net/
IGN: Developer Journal: Allegiance - By Joel "Solap" Dehlin. Contains comments on development process, concept, and team background. - http://pc.ign.com/articles/075/075281p1.html