No Question: The XPage-Feature introduced by Notes/Domino 8.5 is quite cool. Web applications look like modern webpages. But how can Lotus Workflow participate from this?
First of all, there is no integration/support out of the box. Quite a shame as more and more applications move towards this new technology.
Is there a workaround? Maybe! You can build your own custom controls. But which API to call? Call the agent used by official” API to do your work? – No good solution, this even does not work reliable. Of course you may alter items directly, but what about compatibility in the future? And what about exposing Tasks and Decisions? – There is no API for this features.
Seems to me, the only real solution is an official upgrade by IBM. Any other implementation may fail when upgrading to a new version or lack of functionality.
So, all we can do is sit and wait for Big Blue moving 
There is already an idea on IdeaJam dealing with XPages – feel free to vote ;o)
