Microsoft just released the second beta of IE8, which is described on the download site as "Faster, Easier, More Private, and More Secure."
The new features are Compatibility View, InPrivate Browsing, Accelerators, Web Slices, SmartScreen Filter and Search Suggestions.
The compatibility view enables you to switch between the available render modes (Quircks mode, IE7 mode and IE8 Standards compliance mode).
With the press of a button you can enter InPrivate Browsing mode, in this mode IE doesn't save things like url history, cookies, forms autocomplete information etc.
The standard IE8 beta 2 download replaces IE7 on your pc so i installed a version from The Internet Explorer Collection. This download contains standalone installations for all IE versions, including the new IE8 Beta2.
I've already experienced the first crash, but thats might be a good thing since automatic crash recovery is one of the other improved area's of IE8
Update: after installing the béta the popup-blocker is screwed in both IE7 & IE8. De-installing the béta from the Internet Explorer Collection and installing the "normal" IE8 beta fixed this. The disadvantage is that i've now lost IE7, but so far IE8 seems to be working ok.