finally, jon flanders put his atlas-powered workflow designer online. you can read about it and download it at [1], or have a look at the online demo at [2].
looks like a good point to start from for hosting the designer in a custom web application.

[1] atlas based workflow designer
[2] online demo

great!
i just noticed Ashish Shetty’s post about his netfx3-based p2p version of sudoku [1], get it at [2].
his implementation takes advantage of windows communication foundation, windows presentation foundation as well as windows workflow foundation, requiring the june ctp available at [3].

for solving your daily sudoku without the need of installing anything you could also point your browser at [4].

[1] http://nerddawg.blogspot.com/2006/07/sudoku.html
[2] sudoku at netfx3.com
[3] netfx3 june ctp
[4] websudoku

there are two more books on the windows workflow foundation listed at amazon and waiting to be published:
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As you might have noticed, WinFX recently became .Net 3.0 [1]. They set up a nice community site at [2], this is also where the WF now resides [3].
At [4] you can find a comprehensive overview of blogs related to the WF, aggregating blogs of the WF team members at Microsoft together with community blogs. That’s really great, ’cause now subscribing to one single newsfeed keeps you up to date.
Thanks for the link!

[1] Welcome to NetFx3.com
[2] Microsoft .NET Framework 3.0 Community (NetFx3)
[3] Windows Workflow Foundation
[4] WF related blogs

Todd Kitta [1] just dropped me a note [2], he is working on a book entitled “Professional Windows Workflow Foundation”. As he posted [3] on his blog, the book is going to be published by Wrox Press late 2006/early 2007, i’m sure it is worth waiting for!

And yes, the reflector [4] is definitely one of the most important tools when working with the wwf by now.

[1] Todd Kitta’s Integration and Workflow Blog
[2] http://www.manuelfoerster.net/wordpress/64/#comments
[3] Professional Windows Workflow Foundation
[4] Reflector for .NET

really lookin’ forward to dharma shukla’s [1] book “essential windows workflow foundation”. as the last book on the wwf [2] (still the only one available) is kind of deprecated (only covers beta 1) and not at all in-depth (which it wasn’t meant to be, so i’m not complaining ), i think it’s time to release a new one.

[1] http://www.dharmashukla.com/
[2]http://www.samspublishing.com/title/0672328488

there is a quite annoying problem with custom activity libraries in beta 2 of the windows workflow foundation.
compiling activity libraries with ActivityValidators yields errors like Activity ‘foo’ validation failed: Property ‘bar’ is not set.
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WWF Beta 2 comes along with a SqlWorkflowPersistenceService for persisting the state of longrunning workflows. As this service only works with Microsoft SQL Server or the Express Edition, you might think about creating your own persistence service which could target any other storage medium, like other relational databases, files, or - in this case - datasets.
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with the rules capability in the windows workflow foundation [1], parts of business and application logic can be represented by more (policies) or less (conditioned activities) complex rulesets. the most important advantage is, that you can load and update those rulesets dynamically at runtime. e.g., validation logic, calculation, etc. could be sourced out of the application.

to get in touch with the rules engine, read the comprehensive introductory article at [2] and have a look at the corresponding hands on lab [3].
[4] shows how to host the ruleset designer in a custom application, for defining and modifying rules at runtime.

[1] windows workflow foundation
[2] Introduction to the Windows Workflow Foundation Rules Engine
[3] WWF Beta 2 Hands on Labs
[4] external ruleset toolkit