Nodes can be anything.
Basically just a vector and a vector is storable in an array.
So why dont just get a huge array and create some nodes.
For example you can use 3 vars for the position and 4 for the connection ids.

That is how you can get the position or connections out of the array
yourarray[id*7] is the vector
yourarray[id*7+3] is the first connection id
yourarray[id*7+6] iss the last connection id
(and those between guess what xD )
Using this you can create a lot of paths in realtime
you also can use entitys instead of 7 array vars for a node
and use the skills for the connections.

You see there are a lot of possibilitys to make nodes in real time.
Maybe there is a way to create the standard WED paths in real time but since i dont use predefined functions like paths and templates and stuffi dont know.


EDIT: @ Xarthor:
Lol? Define Any-Node, WEDnode?