Some new stuff:
The download can be found at Microsoft's website.
Roaming Identity - Your display name follows you any place you sign into. Now your display picture and personal message will follow you too. If you would prefer they stayed in place you can turn this off (Tools->Options->General -> Sign In -> "Use the same display picture....") Contact Card - The contact card has gotten a updated look. Instead of a flip it does a slide to toggle between the Spaces and Contact information. Also no more squinting at an icon and trying to figure out what it means the actions on the card are now listed out plain and simple. Emoticons, Winks, Backgrounds, Display Pictures - The menus have gotten an updated look. They include a recently used list and easy access to featured content so you can get new emoticons, winks, background and display pictures to use. hint: typically in the featured section the first 4 are free. SMS Phone Book - You now have a quick way to send SMS to a phone number or add phone numbers for your contacts. Just click the cell phone icon in them main window for a good time. New Contact Emotion - In 8.0 all our icons got an update but we forgot a very important one. The contact emoticon. Type (M) to send it. Status Menu includes Sign Out - We noticed people look in the status menu to sign out and so ta-da now you can sign out from the status menu. Report abuse feature Vista Presentation Mode - When you are in Presentation Mode on Vista Messenger will change your status to busy so you can avoid the embarrassing situation of everyone reading your IMs! Don't worry if you want to show Messenger in your presentation you can turn this off (Tools->Options-> Personal-> My Status -> Show me as "Busy"...).