The nukeSEO Mouse Hover over Topic BoxOver popup forums mod provides BoxOver popups in the viewforum and search pages of the Forums module.

BoxOver's use of the title tag enhances search engine optimization in addition to improving usability in the forums by displaying the last message in the topic. This enables visitors to see the discussion before navigating to the topic.

NOTE: Includes BoxOver 2.1 from http://boxover.swazz.org