Available in LabVIEW NXG. All subVI terminals are 10 pixels in size, and VI connector panes can be resized both vertically and horizontally. By resizing the standard 4x2x2x4 connector pane horizontally by one terminal, you can easily create a 4x3x3x4 connector pane.
When searching before posting this idea, as one should always do, I found it was already mentioned by JackDunaway in a comment on another thread, however I still think it deserves an idea all of it's own. I would like to have a few more options for connector panes which maintain the "Standard" 4-in 4-out template, but in particular with 3 connectors on the top and bottom. Let me link to Jack's image as well, so that my plagiarism is complete:
I agree with many of the other comments in that thread as well, so head on over and kudos it also.