Professional and serious amateur photographers have been waiting for (or beta testing) Adobe Photoshop Lightroom, first shown almost two years ago. Now it has been released, Ars Technica has produced a decent 8-page review.
Naturally there's a page about Lightroom v Apple's Aperture, but this bit is extremely disappointing. Maybe someone has done a better job, and if not, there are at least a few blog links in Notes from a Tool User. (Well, Inside Aperture is doing the job, but it's an Aperture-specific site.*)
Of course, for most photographers it's not an issue: Aperture is Mac-only whereas Lightroom runs on Windows as well.
* Corrected
Footnote: Jack Schofield is a former editor of Photo Technique, Film Making, You & Your Camera (a partwork), ZOOM and The Photographic Journal of the Royal Photographic Society, and produced a string of books including The Darkroom Book. There's not much demand for that one nowadays....