Microsoft released the first service pack for Office 2011 for Mac. There's not a host of noticeable changes, most of the work is under the hood a few security holes sewn up etc. Here's my initial pass focussing on Outlook.
Service Pack Caution
Service Packs on Microsoft operating systems can cause as much havoc as they can resolve, just be cautious and don't rush to install them straight away.
Luke Darby 