In what feels like a really quiet release, you can get IE9 RC over at Beauty of the Web. Not sure what's changed, but it's nice to see a release... and anything that pushes web standards and new technology like their GPU accelerated canvas stuff is a good thing. Great job IE team!
Not to mention tying in javascript processing to power management so you can control just how much battery that life sucker is going to eat per cycle. The only drawback is that IE9 will only work on Vista+, so people out there on XP on a laptop or netbook running XP that would really boon from the assistance, don't have a chance.