This was discussed elsewhere, but I thought it would be worth raising here too.
Basically, it'd be great to be able to pull up a set of post that belong to multiple categories/subcategories.
So if you have:
You could display posts that belonged to Cat 1.1 and Cat 2.1, ideally through manipulating the query string (so static pages can be used as customised advanced search options).
The previous discussion was posted here:
And if anyone knows a workaround/hack/plugin that provides this functionality (without using tags) I'd be most interested in hearing about it.