As an information security architect, you rely on past experiences and any resources available to you to guide the recommendation, guidance and designs you create. While there are resources out there, they are less than most disciplines. I just wanted to throw out a few that I highly recommend and have seen in my travels. (Also to have a quick place for myself to find them in a aggregated place). In no way the end all be all list, but some good info.
Disclaimer-I’m not a fan of ISACA so linking to this must show that it clearly is a well written article. Security Architecture One Practitioners View
TISN (Trusted Information Sharing Network out of Australia)
Lenny Zeltser’s Security Architecture Cheat Sheet for Internet Applications
Cliff Notes from Securityarchitecture.com regarding different Security Architecture Frameworks
ArcTecGroup’s Security Architecture Blueprint