One feature I see in lots of other mind maps is a small table in the node, thus giving the user the ability to list longer lists of related information without having to create many extra nodes.
we have the concept of attachments – where you an add lots of rich text stuff including tabular info. (http://blog.mindmup.com/p/working-with-attachments.html)
What would you get with table nodes that current attachment support doesn’t give you?
Primarily visibility on the graph of condensed information. Using attachments isn't as useful for presentations for quickly conveying several small bits of information that don't deserve their own nodes (for cluttering issues). Here's two examples of some information you might want on a mind map visible that having in a separate file is less convenient, but having having spread across multiple nodes would also be far more cluttered: http://imgur.com/ZL1Ppw3