Passing parameter to CFC while using CFGRID bind

I am attempting to use CFGRID to display some data. I have a CFGRID set up using a bind to a CFC which is fine for a hard coded SQL but I want to pass a parameter.

I started with the example at http://www.garyrgilbert.com/blog/index.cfm/2007/6/14/Coldfusion-8s-CFGRID

I'd like to pass one or more variables to filter down the result set.