Quote fromI like this. I'll see about getting it discussed in the New Nether thread.
Acid rain is the obvious weather choice, Perhaps an umbrella could be made from Asbestoskin to help deal with that. It would also be interesting to have actual earthquakes that cause fissures
Now that you mention it, the Nether is the only biome so worthless that players wouldn't mind desctructive earthquakes on a regular basis. That would be really cool.