I have not yet commented on the revolutions going on through out the world, because all of us astrologers will want to be on that band wagon.
But I feel it needs comment. Uranus has introduced himself in Aries with possibly the worst earthquake in Japan's history. We are seeing the entire Middle East Islam based culture begin to question the basis of their civilization , in fact; (that is monarchical or religious oligarchies.) World economies are crashing, countries are being downgraded with their debt, and America is reeling from it's own stupidity in the housing bubble and the crash it effected.
This is a short blog, so I will mention only a few things. The planets are aligned very similarly to 1763-1776, The American Revolution. Then as well as now, the show stoppers were Pluto in Capricorn holding onto the power, and Saturn in Libra knowing the people were being treated unfairly, with Uranus in Aries urging breaks from the old.
Then as well as now, the powers that were established would not want to let go of power easily. With the T Square, many of  the revolutionaries could not go backwards; that had to go forward with the revolution, so as in any Cardinal Square; the egg shell had to be broken to make anything; including a cake.
Finally; the last two times Uranus went into Aries were also earthshaking. It ushered in the Great Depression (World Wide) in 1928-29, and the time before, the 1848 revolutions in Europe and the Gold Rush in America. The Gold Rush finished any idea that we, the European invaders of the Americas, would give any quarter to the natives that lived here before us, ending with Wounded Knee and the the Uranus opposition to itself in 1890.