Well. a lot of stuff seems to be happening already. Edgar Cayce predicted that California and a lot of other places would fall into the ocean about now. n fact it's the other way around, the ocean will advanc to cover a lot of California, Georgia, Florida, Bahamas, huge areas of Thailand and other SouthEast Asian lowlands, as well as New Orleans, Manhattan Island, Washington DC is essentially a swamp, not much loss there, and a lot of places in southern Texas, Mississippi, Louisiana, etc. Greenland's ice cap has been estimated as capable of increasing the ocean by another two or three meters depth, which is quite enough to take out Venice etc, plague the Netherlands, wash all the heroin out of Marseilles and put the ministers feet awash in British Parliament.
The Sun's poles change polarity with the sunspot cycle every 11 years. That's normal. However, the Earth is covered by sea water, a conductor, in the solar wind, an electrical current. Moving a conductor in an electrical field causes an induced current, just like any other transformer. The induced current causes a magnetic field. So the Earth's magnetic field is going to go everywhichaway as the oceans change depth. The regular pattern in the past has been every 60,000 years, probably as an ice age effect, but this time we'll see something new.
There's an asteroid called Apophis
www.armageddononline.org/99942_apophis_asteroid.php that might come by and give us a whack, which will definitely change the polar rotation. It's due to come by benignly in early 2013. Whether the change will be detectable, as compared to theoretical, remains to be seen.
My personal feeling is that we'll have a lot of earthquakes as the tectonic plates reestablish equilibrium about the mean geodesical surface. The "rim of fire" plates are especially vulnerable due to their subduction zones. I just moved, and the wife and I made sure to have rocks under our house, and a location high enough to escape the onrush of sea water, even if we have a tsunami. The fact we're built on an earthquake fault promises to be interesting too.
For something else to worry about try this site,
neo.jpl.nasa.gov/news/news146.html where they discuss the odds of being whacked in general, as well as by known rocks. And Mars has a few rocks headed that way as well.
www.space.com/scienceastronomy/071220-asteroid-mars.html but the arrival time is much sooner.
As the oceans rise we are going to have a tremendous population pressure in SouthEast Asia. Muchof the low growing region will flood, so as we double population every 33 years (the usual rate) we'll also be reducing food supplies. That looks like a good excuse for a war. My guess is that we're going to run short of supplies in about 100 more years, not in 2012. Then there will be a period of major chaos and a lot of people dying of starvation, disease and things their neighbors do to them. After that, with luck, we'll learn to get along with each other, perhaps.
I think I'll watch a lot of this from the sidelines in spirit!

dave