What will replace Human Workflow Service in the future?

My company uses K2 for our human workflow interfaces. We have had to write our own workflow engine to get the functionality we were promised to work. Short story, I would avoid an investment in K2 until their product is more mature (if I remember correctly, multiple routing paths and some other \”normal\” workflow requirements don’t work as promised). A friend of mine that does BizTalk consulting has told me that the human workflow in BTS 2006 is wonderful, but I have yet to try it out. I am in the beta program and one of the TAP programs, so I haven’t had much time to play around with the workflow stuff yet. I’m looking forward to the next iteration though.