Subdirectories install support for blogs at multiple level/paths

It seems like a reasonable feature and I've seen a number of threads on the topic of having blogs at multiple levels/paths. The last implementation is at this link, and seem pretty clear, except it's done with old code:

http://maisonbisson.com/blog/post/14052/wordpress-hacks-nested-paths-for-wpmu-blogs/

Here's another discussion of a use case:
http://wordpress.org/support/topic/integrate-same-categorysubcategory-urls-for-wp-posts-amp-non-wp-cms-pages?replies=1

Any chance of a feature like this being implemented?

Thanks,
James