Already up at Channel 9 are some videos highlighting improvements in IE9 RC. Our early favorite? – the ability to create pinned sites with multiple tabs! We’ve just installed the RC here, but so far so good, and we’ve noticed that some annoying bugs from the beta are gone. Here’s Channel 9’s “5 features of IE9 RC”:
Channel 9 has also posted “A look at three performance demos for IE9 RC”, check it out