I get a number of queries about when WF will ship, or (more frequently) when the tools will be ready. The answers are "done" and "done." I've had two internal requests in the last week along these lines, so I wanted to try to state this as clearly as possible. The tools for WF are released and supported. The tools for WCF and WPF are in CTP and will continue to be updated in a CTP like fashion.
You can get the bits from the list of links here.
It is important to point out that the "Visual Studio 2005 Extensions for .NET Framework 3.0 (Windows Workflow Foundation)" is shipping and supported, while similarly named "Visual Studio 2005 Extensions for .NET Framework 3.0 (WCF and WPF), November CTP" are being published as a CTP, so things can and will change with the WCF and WPF tools. Let me say that one last time in case you got caught up in the names:
The tools for WF are released. You can use them today.
I'm a little late to notice this, but Eilene Hao, a PM on the SharePoint Workflow team, has put together a massive 7 part series on writing workflows in SharePoint. I haven't focused a lot on workflows inside of Office, looks like I need to spin up a VPC and dive through some articles!
A few weeks back Paul Andrew and I sat down with Ron Jacobs to record this Arcast about WF.
The funny thing is that a few weeks before that, Paul Andrew and I sat down with Ron Jacobs to record that same Arcast, except there was a problem with the microphone and Ron's voice didn't get recorded, so it was as if Paul and I were extemporaneously responding to the voices in our heads about WF.
There are more questions to go through, so we will be doing at least a part 2. Any feedback or other questions you want to see answered? Let me know!
Dennis has put together a nice sample showing how to host a workflow inside of a Windows Service, a common request for people looking to host long running processes. Check out his posting here. This sample is also available on the community site here.
We're working on some other samples around hosting, so stay tuned for details on those!