How to have section template for custom post types

Hi there,

Still getting my head around wordpress and custom posts.

So, I’ve got three custom post types… articles, news and videocasts.
I want to have the “home” page for each of these sections use the same template and display all posts in each of the custom post types.
I can understand how to do this if I had a custom page for each post type using the
query_posts( 'post_type=name');
query…

But how to I make this dynamic so that I only have to have one template and the ‘name’ above is replaced with the post_type name from the url. eg in articles it would be http://www.example.com/articles and the template would know that it should be displaying all posts from the articles custom post type?

I’m sure there is a super basic solution to this…?! Any help would be very much appreciated.

Thanks! mark