I have been playing around with your plugin and I was able to make the spirit jump for both connected users by simply adding simulate jump on data received. Kind of cool.
Here is a my .capx example of a platform sprite jumping. Every time "return" is clicked the sprite jumps in real time.http://dl.dropbox.com/u/23433797/ChatJumper.capx
I am basically trying to eventually replicate something similar that was done in ImpactJS using ImpactConnect that uses socket.io and node.js.
Multiplayer Example Video:
I like construct2 much better than ImpactJS.