Oh. I was just coming in here to suggest that. I would also like to suggest PowerCrystal's Nether Ores, as they add some more use to the nether. I haven't had a chance to test the recently updated version myself, but if it's like the previous versions, the ores blend in well, and rare ores are still rare, even though they are somewhat easier to find due to the large amount of exposed 'rack to find them in. In previous versions there was also a chance that mining nether ores would cause a explosion, and plus mining them sometimes upset the locals. While I am uncertain if these functions are still included, or if not, if they will be added again, but what I can say, is it adds some more reason to explore the nether, beyond draining it of it's lava and looking for fortresses to raid.
However, the recent update has added several new nether ores, including Uranium for IC2/UE, and Nikolite for Redpower 2.