With pleasure
In Fallout 3 (2008) The Lone Wanderer's birth date, 7/13/2258, is a Biblical reference to Micah 7:13, which reads: "And the earth will become desolate because of her inhabitants, on account of the fruit of their deeds."
In Fallout 3 (2008) there is a town called Big Town. In this town there is a pole, right in the middle of the world map, that reads "TES-04". This is a reference to The Elder Scrolls IV: Oblivion, that was made by the same company (Bethesda Softworks)
It's possible to meet a guy named Fawkes in Fallout 3. If you ask where he got his name from, he answers "From a man who died for what he believed in"
In Fallout 3 (2008) there is a building called 'The Dunwich Building'. You fight through hordes of ghouls to get to the bottom, where a big obelisk'ish statue starts whispering mad talk to you. This is a clear reference to H.P. Lovecrafts book "The Dunwich Horror". The reference is supported in one of Fallout 3's DLC's where you find a book called "Krivbeknih" that you must take to the alter in Dunwich Building. This whole thing is a reference to the Cthulhu mythos, the Necronomicon and H.P. Lovecrafts strange books.
There's a really strange encounter in Fallout 2. You can encounter a bridge with a man in purple ropes guarding the entrance to it. When you walk into the encounter, your character says "I feel like I should save my game in a new save file!". When you go up and talk to him, he will ask you three questions. The first two usually makes sense, but the last one is very hard (Like "How much can a person carry if he has 7 STR and 2 Strong Back perks?")
If you, however, answer correctly to all three, he explodes and leaves his ropes which is an amazing armor, giving almost as much AC as the power armor. When your character examines the rope, he comments on the redundant colour of purple the rope has.
In Fallout Tactics (2001) you can meet Morte, the floating and very charismatic skull from Planescape: Torment. He will say that he got lost and took a wrong portal in Sigil, more precisely a secret portal in a brothel window, thus ending up in the Fallout plane.
This thread also covers a fun little thing from Fallout 2, something I encountered myself and giggled at for weeks.
http://forums.didyouknowgaming.com/showt...p?tid=1590