Ok, so we previously had a vote (a few MC versions back) about the nether being reset every so often. I think that because the nether has changed so drastically (Nether Fortresses and all their inhabitants) that we should have a re vote on whether glowstone should be regenerated or if the whole nether should be regenerated.
{There are plenty of xp farms, well-established homes, etc in the nether since 1.0. Not to mention wart farms. All these would potentially be regened if we regen the whole nether. If we regen the glowstone, everyone will get a chance to get glowstone, but no builds or anything will be destroyed.}
[Edit][Proposal] I have added a third option: we could have a small established part of the nether where it's never regenerated. This way we could keep small xp farms, etc. Then the rest of the nether would be regenerated.
[Proposal #2] We could have a /mine for the nether, for those who think it's still fun to explore the nether and find new things. And not worry about the nether lpoking dirty. So upon entering the nether, you would be notified of the /mine feature (or whatever it would be) or you could just stay in the nether that won't be regened.
^Remember these 2 features are just proposals and are not guaranteed to be implemented.