My ring of fire is actually on fire again, as are the top of the towers on the side of the barn. :)
The portal (in the top level of the big building with the columns next to monroeski mine) ended up going to a spot in the nether at level 33, (way below where the overworld portal is) which happens to be essentially a very very large underground cavern. There are ghasts there, but not nearly so many as there are farther up in the nether. :cool:
Also, I tried some nether mapping on my own...I'm not sure there is any good way to do it, because the top is not open to the sky, it's just covered with more netherrack and bedrock (in the same multi-layer-thick-bedrock way that the bottom of the map is). The overworld map is still working fine.
And as another heads up, 1.6.6 is supposed to be out later this week, and then a long gap before the release of 1.7.

