+1 to Steven's skepticism. I also shared some more concerns on the talk page.
In theory, the Flow project is meant to tackle discussions + workflows. In practice, I've made a conscious effort to shift the focus to discussion first and foremost, which I feel is a way more pressing issue (practically and ideologically). I'm open to hearing other people's take on why automated or semi-automated workflows are equally or more critical, but I'm going to push for a lot more user-centered detail, because I don't feel like I've seen a compelling rationale for how, specifically, this is going to benefit our end-users. If fr-tech needs a workflow engine for its own purposes (Adam, maybe you could provide us with more background on what purposes those are?), that's totally cool and fine and you guys should build one – but let's be careful not to end up in the "when you're holding a hammer, everything looks like a nail" situation :)