The number of online resources about workflow development on the SharePoint platform is finally increasing. If you want to start doing workflow development on MOSS 2007 yourself, you will first need to download the next two resources:
- Visual Studio 2005 extensions for .Net Framework 3.0 RTM
- ECM Starter Kit for Beta2TR - the one for RTM is not available yet, but apparently this one also works. The RTM ECM Starter Kit will be shipped inside the MOSS SDK and the WSS workflow templates will be shipped inside the WSS SDK. These should be coming out in the next couple weeks.
First start of by reading about the basics of workflow in WSS and MOSS:
Also take a look at the series of workflow articles by Eilene Hao on the SharePoint Blog - these are a must read:
Some other resources:
Creating Workflows for Windows SharePoint Services (Virtual Lab)