Apparently, the Polish company Cenega, who is handling Fallout 3 in Poland, ran a poll with almost 2000 people voting for what they would like to see in the Polish version of Fallout 3's Collector's Edition
In order, the results are: Vault water flask, bottle of Nuka-Cola, a bobblehead, and t-shirt.
Cenega is looking for manufacturers to produce these items, and will update at a later time.
Thanks to briosafreak for the news, and Ausir for the OP.
You can check out Cenega's homepage if you can read Polish here