Includes coverage of what we tested as well as recommendations for scaling your workflow out to enterprise levels. Many of the recommendations are good even if you are only running a few dozen or a few hundred processes concurrently – they are just good practices.

Article on using the SPWebProvisioningProvider class on SharePointBriefing.com

MSDN Whitepaper: Learn about the steps that are necessary to successfully deliver a workflow into a customer or partner environment using SharePoint Products and Technologies. (24 printed pages)

MSDN Whitepaper: Examine the options, process, and benefits of adding support for SharePoint workflows to your application, and for breaking that support into components that clients can use to build their own workflows. This article is part 1 of 2. (21 printed pages)

The #1 book on workflow in SharePoint 2007, published in February 2007 by Apress.