Oregen is in

So ores should generate inworld now. Completely untested. Numbers will
be tweaked. As of now, there should be approximately 50 fossilstone and
100 of all other ore blocks per chunk.

I'll have to look up the vanilla values soon, but this should be fine in
the meantime.

Also, here's something wild for ya... should we just go for every nether
ore? Eventually all blocks will be config-wired, so we can just enable
the ones we like by default. There's currently no current nether ore
mod...