BizTalk and Team Foundation Server?

Eric Lee has a pretty interesting idea here of integrating Visual Studio Team Foundation Server with BizTalk Server to create a Virtual Kanban System. Pretty funky stuff and pretty cool.

It sounds, though, as something where possible Windows Workflow Foundation would be an even better choice than BizTalk: It's more lightweight (certainly less expensive for this case) and would offer a more expressive environment for this kind of automation (using custom activities). WF integration for TFS v2.0 process templates, anyone?

Then again, the BizTalk/WF distinction might not be needed one day :-)