yesterday when i was on the crapper, i was reading back issues of GI, there was an article on FF7 (these were really old issues), when i thought...
"huh? how many weapons in the newer FF games have appeared in the older games, or have had any connection to anything in other games?"
well... this is what i came up with

-masamune - sephiroth's weapon, auron's ultimate
-god (god's) hand- tifa's ultimate, rikku's ultimate
-murasame - this one is basically all of them
-ragnarok- cloud's weapon in 7, airship in 8, tidus's weapon in 10
-all of lulu's dolls were people, characters, or weapons in previous games.
-highwind - airship in 7, kimahri's weapon in 10
-spirit lance - im pretty sure this was in 7, kimahri's ult.
-come to think of it, almost all of the lances were in previous games
-rune steel.... im just listing the weapons now, not who had them.
-full metal rod
-heavens cloud
-kaiser knuckles
... thats all i remembered while on the lou, but if u all know anymore, drop a line and post em