Microsoft seems to have turned on the Windows Live Groups menu in the new Messenger wave 3 beta! Now, when you right-click on a Groups name the following (see image on right) option menu will pop-up, which were greyed-out, but now, they’re activated and directs you to the appropriate websites associated with the Group. Unfortunately most of these links currently directs you to the 404 “We can’t find that page” page.
Clicking on Calendar in the menu will direct you to your Groups’ Calendar, as shown in the image on right. You can even set the theme for your Group here. The URL it directs you to gave away the address of the new dogfood Calendar server? Take a look - it works for your own personal Calendar too! Although it seems to be only 11 days newer than the public release.