For those who’ve been using/developing WordPress sites for a while now, you probably have become quite reliant on knowing the actual id number of posts and pages, as well as categories, especially for customizing navigation, as well as creating category specific templates. You probably have also been equally frustrated at them being removed from the admin in 2.5+, I know I have. Well, leave it to the community to solve a problem. Nick Ohrn has cooked up a nice little plugin that replaces these ids, without seemingly compromising the layout of the page one bit. Certainly a worthy plugin for your dev toolbox. Once a site is developed, you could easily turn it off if you are concerned about confusing users, and then activate it as needed for follow up work. However, it certainly is much easier than mousing over each page and writing down the ID, especially on page heavy sites.