Everybody knows of the Custom Field inside WP-ADMIN, which allows custom data to be added to each post on a post-by-post basis, which can then be processed by wordpress (and plugins/hacks) to do certain things.
What I want to know is, how easy would it be to create a Custom Field for Categories, in pretty much the exact same manner as the posts' Custom Field functions.
My reasons for this are simple - it would allow the categories custom-data to be treated dynamically and individually, each with their own accompanying data held within the Custom Field, just as the posts contain their very own Custom Data, if you understand what I'm getting at. Therefore, I could for example, add Meta Tags to my Categories on an individual basis, perhaps.
I know some people think Meta Tags are now almost redundant, but there are many search engines which still see them as important (MSN being one of them) - and I feel for this reason, the inability of a WordPress user to be able to type in their own meta tags (keywords and description, ideally), by using a Category Custom Field or two, this is a big shame.
I have seen plugins which generate meta tags using the categories descriptions, and use a snippet of that etc, but in my honest opinion, this isn't good enough. Unless you manually type in your exact keyword-rich meta, and absolutely perfect meta description yourself, you may aswell not be using meta tags atall. It's about precision.
I'm no expert on WordPress or PHP, but I've always managed to come very close to getting what I want out of both by sheer determination (and half a brain, of course:). But seriously, some expert advice on how to best go about this, if it can be done, and some pointers would be very useful and very appreciated by many, many WordPress users. It may not even be a case of 'custom fields' been used, but the general jist is, (this is how many current meta-data plugins for posts work), if theres a way to do this but for Categories, then we are all going to benefit.