This is a really good feature -- open action, as described in this blog (http://blogs.jetbrains.com/idea/2009/06/find-action-saves-time/).
But I don't see anything happen when there is no project open and I am at the Quick Start screen. I think it is a bug because I can't use this nice meta-short-cut to open a project! Can someone confirm?
(This is a great feature especially for someone who's getting used to the IDE and wants to use keyboard more effectively).