Hi Guys
 I received this question from Jay today and I thought this might be a questions for may of you:

Where can I find the relevant material for WCF, WWF, WPF?

 This is a very general question and I am not the right person to answer it completely. I have put all my focus on Windows Workflow Foundation and that's the only area that I can give you acceptable answers. Usually the first reference for the Microsoft technologies is Microsoft itself (Microsoft Official Curriculum, MSDN and Microsoft eLearning), but this advice doesn't work here. The first question is: what is your development background? I am not talking about .NET development skills. I mean good and deep understanding of Object Oriented concepts, Abstraction, Inheritance, Polymorphism and Design patterns. Good is not enough. You should be excellent. WF is developed based on OOA&P best practices and design patterns and once you are confident in OOA, it is quite simple to proceed. So to start with I personally recommend Object-Oriented Analysis and Design Using UML (OO-226) delivered by a very qualified instructor. As a trainer I have delivered this course for a couple of times (With Microsoft Visio and C# because I don't know Java ☻) and I believe this is one of the best starting points for most of the developers. Buy the way, you can find all classic design patterns in .NET here. The more you know design patterns the easier you learn WF.
As an MCT I always recommend Microsoft Official Curriculum (MOC) as the first step, but it seems that Microsoft is a little bit slow in releasing MOCs for .NET framework 3.0, so you should rely on MSDN and Microsoft eLearning at least for the time being. After the OOA&D warm up you have the following steps ahead.

1. Understand the workflow basics: read this articles in detail Windows Workflow Foundation Overview. If some parts are not very clear don't waste time on that part. Go through it quite fast and everything will be bright. If you can understand it 70% you are in a good shape.
2. Some visual workflow development taste: I don't mean to scare you, so let's experience the joy of Workflow Development with this article Getting Started with Microsoft Windows Workflow Foundation: A Developer Walkthrough that is published on MSDN by Solid Quality Learning (SQL). (I know Solid Quality Learning (SQL) from the time that I was living in Dubai. They gave us a training on SQL Server 2005 in July 2005 before the product release and the training was wonderful. The trainer was Dejan Sarka). I don't consider this article as a training material. It is just a developer test drive to work with workflow extension and see how it is like developing a simple workflow.
3. Have your hands dirty with code: you may start from here Windows Workflow Foundation Tutorials depending on your taste. If you are a kind of person that can follow the code and instructions and learn the concepts, this is quite good and reliable content (this is MSDN-programmers bible, so you can put your right hand on it and swear in the court. lol). These samples are beautiful and they go deep into code level WF development. The walkthroughs are not visual and you may need a bit of code manipulation to open these examples with the workflow extension visually although all the codes compile successfully. To open the files visually you only need to make sure that workflow class is the first class definition in the code (It is just a matter of cut and paste that we are all expert in it).
4. Spend a little bit on books: Hah, not everything comes as free download. If you are looking for a clean way of learning workflow foundation your candy material is here Microsoft® Windows® Workflow Foundation Step by Step. This book is sweet, but it doesn't mean that this book alone will make you a professional workflow developer. Good Object Oriented is still a MUST. By the way, this book is not perfect. Check this link before you start with the book.
5. Learn workflow patterns and techniques: You are not supposed to reinvent the moon. Maybe by now you know how to drive WF; but do you know the driving rules? You can learn workflow patterns here: Programming Windows Workflow Foundation: Practical WF Techniques and Examples using XAML and C#.
6. Find the right technology: WF is a super luxury sports car. But where can you go with this car. Not everything is .NET, Windows application or ASP .NET. The entire SharePoint workflow is built on WF. Install MOSS 2007 SDK and enjoy workflow development for MOSS with .NET.

Ok guys, I am done with my WF materials. Can anyone of you blog WCF and MPF learning path?
Cheers
Alireza