Sorry, just found a newer number (my previous one was for ewnd-of-2003, this one is end-of-2004): resident foreigners in Germany are down to 6.72 million.

_{*Lunatic*, n.
One whose delusions are out of fashion.}

DoDo, I don't happen to have the figures for the DDR offhand (I deliberately excluded them from my Diss to keep the already over large topic manageable - it also includes the Polish settlers, I'm concentrating on expellees from and settlers in Lower Silesia through 1970) but I believe it is about 4 mill. As to unofficial ones - no. Some did move on to other countries but the numbers are small and they were kept track of. I can look them up if you want.  The story of the expellees in the DDR has recently been the topic of various studies, I can give you references if you want. Initially the KPD had the same position on the borders as all other German parties but was quickly forced to change its tune by the Soviets, something which contributed to its loss of any significant popular support in the West even before it was made illegal.