A new Getting Started Tutorial for Workflow Manager 1.0 has been posted here:
This is a 3 step tutorial which covers creating a custom activity, using it in a workflow, and publishing and invoking the workflow. It covers the use of the HttpSend activity, several of the DynamicValue activities, and also includes troubleshooting steps for common issues related to authoring, publishing, and invoking workflows.
There is also a video walkthrough and a download of the completed tutorial here:
This download also includes the starter files for the tutorial.
I have also started a thread for discussing the tutorial on the Workflow Manager 1.0 MSDN Community Forum. Please feel free to make comments or suggestions to the thread, but if you have any questions, please start a new thread for the question.