New interface to google groups

There is a new beta interface to Google Groups. The first thing I noticed is the layout seems cleaner but there are ads in the new version which are not in the old version. However there are capabilities for bookmarking topics, and creating your own groups.
Update It's definately beta as although the results are shown, some of the results then come back with a "url cannot be found" message. Using the non beta version the results are found.