Cenega, the Polish publisher of Fallout 3 confirmed that the release date will be the same as in Western Europe – October 31. They also announced that the actor to play Dad in the Polish version will be Grzegorz Wons. Funny thing is that like Neeson, he has a Star Wars connection – he was C3PO in the version dubbed in Polish.
Aside from Poland-specific stuff, the press release says that there are 1350 pages of dialogue in the game, and 2000 pages of text overall. Over 80 actors were used for the Polish dubbing, so it can be assumed that the number is similar for the original version. The Polish edition will let you choose between original English and Polish versions.