Ben Vierck over at Devfarm software has put together a list of what people liked most from their PowerWF VMworld presentation. The list also contains the links to corresponding YouTube screen cast videos.
To get things started ... There were 3 features that the people at VMWorld seemed to key in on when I ran the demo. 1) The built in PowerShell/PowerCLI interpreter, 2) using PowerWF to redirect data from PowerShell scripts into Perfmon and SCOM, and 3) using PowerWF to create plugins (activity packs) for PowerWF. Below are some videos showing those 3 things.
Interpretting PowerShell/PowerCLI
1) Convert PowerShell/PowerCLI to Workflow
2) Interpreting PowerShell If/Then/ElseIf/Else into Workflow
PowerWF as an Enabler for a Monitoring
1) PowerCLI data piped to SCOM via PowerWF
2) Interpreted PowerCLI To Perfmon
Creating PowerWF Plugins with PowerWF