So When Can We Expect The Next Batch of American Cardinals

John Allen says don't look for any till perhaps late 2010. :(

His article is sort of more world wide in scope but as to the United States Allen relates:

In terms of the United States, three names may seem conspicuous by their absence from the list of “cardinals in waiting”: the recently appointed archbishops of Baltimore, Detroit and St. Louis, all three archdioceses which at one point or another were considered “red hat” assignments. The consensus wisdom, however, is that since the United States is already over-represented in the College of Cardinals (the U.S. is only the fourth largest Catholic country in the world, but it has the second largest number of cardinals after the Italians), and given shifts in the Catholic population in America, those three dioceses may well no longer be led by cardinals.

If Benedict XVI feels he has to choose which new American cardinal to name first – New York or Washington – many observers believe it will be Dolan in New York. Strictly speaking, Wuerl in Washington has been in the queue longer, but New York is among that handful of “mega-dioceses” around the world – meaning large, highly visible dioceses, considered crucial for the country and the region – where the Vatican typically wants a cardinal to be at the helm.

Moreover, Washington is also an unusual case in that not just one, but two, emeritus cardinals are still in the background: McCarrick and William Baum, now 83. On the other hand, given Benedict XVI’s affection for the United States, it’s possible that the next consistory could include at least three Americans: Dolan, Wuerl, and Burke.

As to changing demographics it has been by view that the Vatican is very aware of this. Within the next decade the possibility that Texas could get one more as well as Atlanta being elevated(with Catholic growth still skyrocketing) in this decade is likely.