"trail menu" feature

I just wrote a module for a client called "trail menu" which implements a feature maybe interesting enough to include it in menu block:

Trail menu displays a menu containing the active trail's menu items followed by the children of the last menu item of that trail (the currently active menu item). It's somewhat similar to a drill-down into the menu...

I've attached pictures to make things a little clearer. In this example I've chosen to present the primary links in its standard block as well as a menu trail version of it. Of course I / the client can think of some options like showing the siblings of the active item or not, but they're not implemented yet.

Let me know what you think about this and how I may help you.

Regards,
Alex