I know that many people are probably thinking that Lightroom is a disguised copy of Aperture, but this program has clearly been in the works for a while. It’s possible Adobe got wind of Aperture before it was released, but screaming “Aperture copy!” is a little off base since other, lesser-known import, convert, keyword workflow apps have been making good money in the professional photography market for some time.
If you are professional photographer, or want to be, then check out the full article at Ars Technica. They also link you to the Adobe site where you can try out a beta for yourself.