Few good articles on Web Services

Understanding DIME and WS-Attachments, " This article explores the rationale behind attachments, including the key ideas around packaging and message delineation, and then looks at how DIME and WS-Attachments arose from these ideas"
Web Service Development Kit (Tech Preview), "Detailed walkthrough of the WSDK Tech Preview for WS-Security, WS-Routing, and DIME protocols. Provides sample code repackaged for VS .NET, some extensions of sample code for more realistic scenarios, and tips on how to avoid 'InvalidSecurityToken' faults when working with X.509 Certificates." [via Sam Gentile's Weblog]