Category Hierarchy

I discovered a category hierarchy within wordpress today and after a few minutes of playing around with it I think I like the new set up. What will happen now is when ever a new post is created that I tag with Kylie or Ed it will automatically appear under the Family category even without me tagging it as such. This will have the effect of keeping the counts a little more true. For instance if the Family category shows 23 posts, then there are 23 posts tagged with Family, but not tagged with Ed or Kylie. However, if you view the Family category it will show those 23 posts and all the posts tagged with Ed and/or Kylie. The Family category acts as the parent category and contains, at this point, the Kylie and Ed categories. At current it is the only nested category but in the future I could see the possibility for others. Such as a Pictures category that would also fall under the Site Info category to easily review all posts of when pictures were added to the site, or perhaps an upgrade category under that same parent for when either the site software or hardware is modified. I guess only time will tell.