On my Windows desk, I’m using Picasa to look at the pictures from the new camera. It compares quite favorably to iPhoto, and even beats it in some respects. I don’t like to compare speed because the hardware aren’t from comparable generations, but Picasa seems a lot snappier in response than the iPhoto, version 2.0, I have.
One feature I like is how Picasa handles importing. If you’ve imported photographs already, but they are still on your xD card because you haven’t figured out how to write back to the card and don’t want to delete them, then they are excluded from the next import. It’s also fast.