imho, that doesn't make sense to do.  i mean, if you're going to automate loading, why not allow selection of materials and props rather than relying on developers to add some specific naming convention?  that's not a very extensible answer.  what happens when there's a Yafaray exporter, or some new free renderer comes along that's better and needs completely different treatment?  then props and materials need renaming just to fit the new system, and can only work for one renderer.  not to mention the literally thousands of props that already exist without any of that information.    why would it be so hard to implement something that just gives people the choice of what to add and how to handle things?

edited to add: ooops, x-post.  i was responding to the prefix idea.