M$ released IE 8 Beta 1, I haven’t tried it yet but seems there is nothing new. It is Microsoft, innovation is a myth. However, Mozilla Labs challenging the user experience with Ubiquity. Check this link and see how M$ loses the browser war. And Ubiquity Ubiquity for Firefox from Aza Raskin on Vimeo.
Neither IE nor Safari. The only browser you need Firefox. It is awesome and Firefox team doing well.