It would be helpful to able to generate a correlation matrix using nonparametric methods through the Multivariate Analysis tools. The current matrix that appears by default uses the Pearson product-moment method. The display for nonparametric statistics is completely different, in a long pair-wise list of all combinations. (see graphic below) It would be nice to have a nicely formatted matrix for different correlation types. We shouldn't use Pearson correlation for everything, right?
It would be especially nice if other options, like correlation probability matrix, was also available for nonparametric methods. Perhaps the default correlation method could be listed on the main Multivariate interface (see graphic below).