I need to bring back some life into an old forum I use to run. http://www.softwarediscussion.com

As you can see, a lot of search engines visit it. What mod should I use to get search friendly urls? Which one is best for IPB? How is my Alexa ranking? http://www.alexa.com/data/details/tr...discussion.com

Will using a SEO friendly mod bring in a lot more traffic?