Marco Giordano has created a follow Node for Maya, and is showing its operation here where MG_followNode for Maya is able to create a connection between objects that is similar to a parent in that transform values are passed along between objects using the constraint. However, with MF_followNode you are able to use weighting with the connection introducing a delay between the object moving and the object following.
Hopefully Marco makes this node available soon.
Marco Giordano writes: Hi everyone this is last node i made for maya .
What the node does is making a connection that lets me controll the object and best think is i can give a weight of the connection and avoiding any pop when the value change so it s fully animable .
This was just the core of the node in version 2 i want to have multiple inputs and switching between inputs influence without having the object popping around the scene how it usually happen with constraints