Hi,
I haven't got any spare time at the moment to have a look at this, because the task is quite important, and the development process a lot more involving then creating few playmaker actions, especially the synchronisation stream and its optimisation with playmaker variables.
My main worries with Ulink is the server side. Photon for example has this amazing cloud system that really ease multi player developments, especially in the PlayMaker context where developers have most of the time very little experience with actual scripting, meaning, they are unlikely to run and maintain a multi user server, I think this will create a lot of frustration down the road. It might be possible with Ulink, but I am not sure how.
If nothing comes up before mid september, get back to me, and we'll see what's possible.
bye,
Jean