In case you missed it, we posted another video showing some of the things you could do with Ember Force in Alpha 2 if you are running Max 2013:
youtu.be/vH4AX5X0a9E
Of course, you can use it on particles in all Max versions, too.
Also note that regular Max Force Space Warps like Wind, Gravity etc. are valid InputField sources, but since they provide a Force value and not a Velocity, you have to scale their input thousands of times to produce a useful field. This has been there since before Alpha 1.