Good news. As some of you may be aware the previously released Outlook 2007 hotfix meant to resolve the maximum number of MAPI connections possible when using Outlook 2007 on an EV server actually caused a series of issues within Outlook 2007 itself causing knock on problems within EV.
Microsoft recently released an updated hotfix for this rollup which resolved these issues and now gives you an option for using Outlook 2007 in a performant manner on an EV server.
The hotfix was released towards the end of February and we have just finished our QA cycles to ensure it does the trick. It does, and so we invite you to start using this hotfix in production, on your EV servers, where appropriate.
For those that don't have it, the hotfix package can be accessed here: http://support.microsoft.com/kb/2475891