David Pallmann's published article which expressed in a design pattern language which may also be accompanied by a symbology. In his first article he describe the symbology he’ll be using in this series to represent Windows Azure design patterns in architectural diagrams, he also going to use in his AzureDesignPatterns.com web site and in his upcoming book, The Windows Azure Handbook, Volume 2: Architecture.
Azure Design Patterns Web Site
Service and Project Symbols
Hosted service project, , Storage account, AppFabric namespace
To Read more about his : Windows Azure Design Patterns, Part 1: Architectural Symbols
You can download the icons here