Adding Headings to Lists

Would it be possible to be able to add headings into lists - for instance I've just created a Nick Hornby list, which currently has all his Novels, followed by all his non-fiction. However it isn't obvious where the non-fiction starts, if I could add a couple of headings in then it'd make this sort of list (and probably lots of others) easier.

I might just change it to a chronological list anyway, but there are other lists where this could be handy - e.g. when listing the novels of an author which includes a series.

Or maybe the option to change the colour of the box? Then each section could be colour-coded. (H) An old suggestion but still a classic!

In the re-arrange/add/delete list page, there could be dividers that you could drag into the items?

That'd work. Colour coding would be a good feature.