Jason, Sitefinity routing converts requests like this into parameters in the RouteData.Values property of the Request. You can absolutely retrieve these from your controls to get specific items based on these parameters.
Take a look at this post that explains how you might do this: http://www.sitefinity.com/devnet/forums/preview-thread/sitefinity-4-x/general-discussions/how-do-i-construct-a-dynamic-page-url-in-sitefinity.aspx
This is the same procedure used for the Intrasite Testimonials Module
example from the Sitefinity SDK
Another key element is the method:
which tells the response not to return 404, but instead continue executing the code on your control. Call this when you find the elements based on the input parameters.
I hope this is helpful!