I was intending to invest in another license of vBulletin recently, as I have been pleased with it so far but I've also been wondering if there are any other bulletin board scripts out there (commercial or open-source) that might be better from an SEO perspective. Can anyone recommend me one or two that come all 'SEO'ed up' straight out of the box? I've had my eye on SMF for a while but I wouldn't mind knowing if there are any other message board programs out there that support and allow for search engine friendly URLs too. I look forward to hearing some suggestions. Thanks in advance.