Nautilus is one of the most annoying interfaces ever. I generally like a lot of the other gnome apps I use, and find gnome in general to be pretty usable, but I don't rely (knowingly) on nautilus for anything, and I don't go to it as a tool to do anything.
My apologies if this is incorrect, but I believe nautilus is responsible for the disgustingly *bad* interface that pops up when you run firefox under gnome and want to choose an application to open something with. I can't just type in a command and hit enter... that would be too easy. Instead, you have to wait for nautilus to load the entire freakin' /usr/bin directory and then click on the thing you want and click "open" or something. C'mon. That's horrid.
I guess it doesn't fit my brain (what little matter there is of it). But OTOH, doesn't an article showing you the hidden features of nautilus kind of speak to its usability? By the way, aren't these features documented in the Nautilus manual?