As I covered a few days ago at SEW Blog, Yahoo has updated their search toolbars for IE and for FireFox. The big change is tabbed browsing for IE and adding a button to bookmark pages to del.icio.us, which is a nice addition.
The folks over at WebmasterWorld are discussing this update. Where Marcia says she uses the toolbar heavily for anti spyware, she likes it because it uses less resources then other toolbars (she says).
Forum discussion at WebmasterWorld.