The Forum pages have been updated to include the new "responsive" layout. As opposed to the nuclear fallout that occurred during the home page update, my hope (and expectations) are that this update will be far less controversial. Very little has changed as far as functionality (I believe it's nearly identical, but in a wider format), and the responsive layout should be ideal for mobile users.
Of course, you are still free to enable the "desktop view" if you're unhappy with the mobile layout - that choice is yours. Please let me know of any bugs/issues/complaints here, in this thread...