Metasapiens has released PageMethods 1.0.0.1 which promises to clean up your urls, giving a more object oriented approach to mapping entities to urls. I haven't tried it out yet, but I'm very anxious to.

From metasapiens.com :

PageMethods provides a solution for the limitations of the standard way of handling pages, URLs and parameters. The usual way to proceed is not structured. With PageMethods, the code of your pages is simpler, cleaner and more reliable. The approach is based on strict page inputs and declarative parameter binding. With PageMethods, each page exposes a set of methods that represent the different ways to call the page. All you have to do to start benefiting from sharp URLs is to add methods to your pages, and mark these methods with attributes provided by PageMethods.