For you GMail users out there who like the threaded view (such as myself) looking to make Outlook behave the same way, be sure to check out this post: Give Outlook a GMail Conversation view. The author walks you through the entire process of setting up your Outlook inbox to behave like GMail. It is pretty simple to do and you can always go back to the standard view if you don’t like it.

Unfortunately, you cannot get the behavior to be exact (GMail archiving, for example), but you can get pretty close. Regardless, this is definitely worth a try if you like the GMail interface.