I've noticed a couple of little things (and I don't know if they've been mentioned) that I really like. I really like that I can just type the name of a bookmark and it will come up. I hardly ever have to navigate to my bookmark bar now b/c of it. Also, I noticed that on https sites there is a padlock icon in the top righthand corner. That may have been there in Safari 4, but I never noticed it. The URL bar/bookmark thing, though, is brand new, right?