iCab 4 is just based on WebKit, the same rendering engine and UI as Safari and Google's Chrome browser. The Safari 4 beta and iCab use a much more recent webkit with FAST java script engine and rendering engine. You want a faster Safari or a free version of this browser, just download a Webkit nightly build. I've been using this for months and it is more stable than the Safari 4 beta and just as fast. It seems like everyone's 'great new browser' is just one real browser that happens to render faster and more accurately than Firefox or IE. And with the "Dev" menu, if a site rejects WebKit, you can make it report any other browser you want to make the site work. =)