If you're a photo geek, you probably have heard of, and most likely use, either Aperture or Lightroom. You've also probably heard that Apple released Aperture 3.0 recently. Lightroom killer tips has taken a stab at starting some good discussion with 5 Reasons To Stay with Lightroom (and not switch to Aperture). The author is biased (duh) and is responding to this article on switching the other way (Lightroom 2 to Aperture 3). From the LR Killer Tips article:

Obviously there's been a lot of buzz around lately about Apple's Aperture 3. I read an article yesterday titled "Five Reasons For Switching from Lightroom 2 to Aperture 3" by a gentleman named Marco. So I figured I'd take a stab at my own rendition of the "5 things" article (no offense to Marco) and write about 5 reasons to stay with Lightroom.

Personally I think it's not a cut and dry thing. Both programs have their good sides and downsides, and quite frankly, I'd love some features from AP3 in LR and vice versa. In reality though, use what works best for you (as always), but don't go flip flopping every time there's a new software release, cause (most likely) your time and effort is worth way more than that :)