I think the best thing about tabbed browsing is the ability to save a tab set as a single bookmark. For example, I have one tab set with macnn, macosrumors, macobserver and macsurfer. When I open the bookmark, all four pages load at once. I can then concentrate on reading the pages. Even go offline if I like. I have another tabset with 11 other mac sites. I use that one on ambitious days. I love tabs - I hope Safari gets them - and for those who don't enjoy them, don't worry, they're only visible if you're using them. They have no impact upon non-tabbed surfing.