Edward Jezierski just announced it here.
"The Web Client Software Factory is a guidance offering currently under development that will provide comprehensive architecture guidance to help customers build web solutions using the Microsoft platform (ASP.NET, ASP.NET AJAX, Workflow Foundation, etc)."
This is the fourth Software Factory the patterns & practices folks have released. I've been looking forward to this one. The others are:
Smart Client Software Factory
Mobile Client Software Factory
Web Service Software Factory
tags: Microsoft, .NET, ASP.NET, Atlas, AJAX, WinFX, .NET Framework 3.0, Windows Workflow Foundation, WF