Architecture Journal (by yag)
Thanks to a tip on Channel 9, I've found out about the Microsoft Architecture Journal. Note that to download the PDF you must register, but the articles also show up online.
As an example, the first issue contains:
Best Practices for Rule-Based Application Development
Business Process Decomposition and Service Identification Using Communication Patterns
DasBlog: Notes from Building a Distributed .NET Collaboration System
Enterprise Architecture Design and the Integrated Architecture Framework
Metadata-Driven Application Design and Development
Understanding Service-Oriented Architecture
Check it out!