Check out the Wikipedia entry on nu-metal. It sorta clears things up, and illuminates foggy ideas about this genre. Which can admittedly be confusing, even to long-time metalheads like me (although Haterbreeder and Toshiro seem to be the metal genre masters ) With those definitions, Sevendust seems like at the least, a partially nu-metal band. Although, they aren't named on the *AUTHORITATIVE* Wikidpedia Nu-metal band list Interestingly, they're described as Groove Metal (Pantera, White Zombie, Machine Head) and I can sorta see that. Also described as alternative metal, which seems pretty fitting. I guess they could be described safely, but maybe not perfectly, in terms of any of these sub-genres. They also have a pretty good description on something called post-grunge (found when looking up metalcore). Bands cited- Creed, Nickleback, 3 Doors Down (although 3DD sound like post-grunge with a touch of southern/classic rock). I found that pretty informative, and it made sense in light of those bands' styles.