Why should you deploy this service pack as soon as possible?
- Outlook is much much much faster
Removes lengthy operations from initial startup.
Makes Outlook exit predictably despite pending activities.
- Folder View and Switch
Improves view rendering and folder switching.
- Office now supports save as ODF, XPS and PDF out of the box, with no other add-ins necessary
- Better security
There are a wealth of good blog entries that dive deeper into the improvements. Gray Knowlton’s post goes into a lot of interesting detail about some of the under the covers changes and the Office Sustained Engineering team blog is a font of knowledge.
]Thanks to Alistair Speirs for the update. Alistair is my local font of Office knowledge.