Google wants a workflow engine/robot for wave too.Google just posted on their Wave Developer Blog that their "wishlist" would have on it a way to process document workflow using google wave. This reminds me of a post I wrote a while back on what google wave could be used for. I did a proof of concept, but taking the concept to production would take too much effort for one guy in his spare time. Probably the biggest barrier is integrating with HR systems. How does the system plug into your corporate HR system to work out who your manager is when you post?
Either way, its good to see that other people see the same value in wave that I do.