I looked at the features when vb5 came out. Nothing that I thought was interesting, seemed like they were really pushing toward the CMS and third-party social features to the detriment of normal forumgoer experience.

I've got no plans to push any upgrades other than security fixes, unless some really compelling reason showed up. And given vb5's reported performance characteristics, definitely not before we're living on some sort of better hardware... you know we've been on the same box since 2007?