My copy of Lightroom Beta 4 finally expired this week, and I've been looking for a replacement. I want a RAW processor that also organizes my data somewhat (with IPTC metadata).
I tried Bibble, and it's the best RAW processor I've used: fast, noise reduction via Noise Ninja, and pretty good automatic results. However, the interface is a little odd (no undo!) and I don't think there's way to use metadata templates.
Since I use a Mac, there's a lot of people wondering how well Lightroom 1.0 compares with Aperture 1.5 . Generally, it seems that Aperture has better organization (hierarchical keywords) while Lightroom has more powerful editing (selective editing).
I'm currently considering Lightroom 1.0 ($199), Aperture 1.5 ($299), and Photoshop CS2 ($299 upgrade).
Here are a few links:
O'Reilly on Aperture
O'Reilly on Lightroom
nice writeup on Lightroom with comparisons to Aperture (2/07 issue)