Their opinion of Google's NativeClient, if they would switch to it before improving ActiveX or Microsoft Xax

http://www.usenix.org/events/osdi08/tech/full_papers/douceur/douceur_html/
http://delivery.acm.org/10.1145/1540000/1538795/p16-kroeker.html?key1=1538795&amp;key2=1178773721&amp;coll=GUIDE&amp;dl=GUIDE&amp;CFID=74123120&amp;CFTOKEN=54

NPAPI - new plugin API
Canvas and WebGL support
Whether they'll be bundling Flash and Silverlight into IE9 like Chrome is doing
Update system - automagic and invisible like Chrome's or nagging, with restarts, etc..