Get your bits here!  There's a new CTP is available, and this includes an RC (Release Candidate) build of Windows Workflow Foundation.  What does this mean to you?  If you've been holding off diving into WF because you're worried about big changes between now and release, you should start thinking about using this build.  You can use the drop down box up top to selected "Download WF" or you can follow these links:

• .NET Framework 3.0 Runtime - first time with the new name, this may become a collector's item someday!
• Visual Studio 2005 Extensions for Windows Workflow Foundation Release Candidate 2

Additionally, there are newly updated versions of our Hands On Labs.  These are a great way to dive into the different areas of the technology.  Check them out here.

This build also includes the updates the ManualWorkflowSchedulerService that Paul blogged about here.  This should help in scenarios where you want to use timers inside of a workflow being run by the ManualWorkflowSchedulerService, such as an ASP.NET application.

Known issues are listed here.