The /about page is a great intro to the Stack Exchange model, but pretty useless as an introduction to the actual site you're on. This makes the page useless for all SE regulars, as there's usually just a blub like "This is a free, community driven Q&A for database professionals who wish to improve their database skills and learn from others in the community."
How about allowing Mods to edit the first paragraph or so of the /about page just like they can with the FAQ? This way the community could decide on a nice little intro for the About page to be edited in by mods, just like the FAQ. It could help reduce scope confusion as in questions like It's not easy to know what each Stack Exchange site is for