The more I learn about Haiku, the more I think I'm falling in love with it. Minimalist that I am, I was a bit derisively skeptical of things like metadata in the filesystem, but it looks like they actually have ideas for using it instead of just having it in there because it sounded cool, and in general concept it just seems like everything I thought Linux would be but isn't. I'm gonna give it a go alongside XP on my newest acquisition, and see if it's as nice to use as it is to read about...
Certainly sounds better than NeXTStep/OSX, at least.