Here's some new info.
Pokétch is now Pokéradar.
Shield and Helmet Fossils are now Armor and Skull Fossils.
Crucial Stone is now Odd Keystone.
New berries have been given names. Since I'm not good with knowing exactly what berries are new, I'll just link to the serebii page since the credit goes to 'em obviously.
serebii.net/diamondpearl/berries.shtmlNew names for items have been revealed. I'll only mention some of them but here's the link to the page
serebii.net/diamondpearl/items.shtmlAdamant Orb is the item that powers up Dialga's steel and dragon type moves.
Electrizer is the item that allows a Electabuzz (when traded when holding the item) to evolve into Electivire.
Lustrous Orb raises Palkia's water and dragon type moves.
Magmarizer is the item that allows a Magmar (when traded when holding the item) to evolve into Magmoltar.
Reaper Cloth is the item that evolves Dusclops into Dusknoir.
Razor Fang is the item that evolves Gligar.
New PokéBalls names are Cherrish Ball and Dusk Ball.
Azure Flute becomes the event item that's for the Arceus event.
Some new names for abilities are Frisk which is the ability that allows you to see a foe's held item.
Combee's exclusive ability "Honey Gather" which allows it to collect honey after battle.
Others are here
serebii.net/diamondpearl/abilities.shtmlLooks like serebii has released the names for all of the attacks. Here they are.
serebii.net/diamondpearl/attacks.shtmlI'll only mention a few of them here.
Gyro Ball and Healing Wish apparently keep their names.
the Poison Spikes becomes Toxic Spikes.
Aqua Ring appears to keep its name.
Electrolevitate becomes Magnet Rise.
Poison Stab becomes Poison Jab.
Stealth Rock appears to keep its name.
Now here are the names for locations.
Hakutai Forest becomes Eterna Forest.
The house there becomes Old Chateau.
Hakutai City becomes Eterna City.
Sonoo Town/City becomes Floaroma City.
Iron Factory becomes Fuego Ironworks.
The Valley Power Plant becomes the Valley Windworks.
Tobari City becomes Veilstone City.
Nomose City becomes Pastoria City.
Yosuga City becomes Hearthome City.
Contact Park becomes Amity Square.
Mio City becomes Canalave City.
Kissaki City becomes Snowpoint City. The temple there becomes Snowpoint Temple.
Nagisa City becomes Sunyshore City.
Zui Town becomes Solaceon City.
Tengan Mountain becomes Mt. Coronet.
Wisdom Lake becomes Lake Acuity.
Trust Lake becomes Lake Verity.
Aspiration Lake becomes Lake Valour.
Lost Cave becomes Wayward Cave.
Fighting Spirit becoems Fight Area.
Battle Park remains the same.
Survival Area remains the same.
Hard Mountain becomes Stark Mountain.
Departure Springs becomes Spring Path.
Return Cave becomes Turnback Cave.
Full Moon Island remains but is spelt as Fullmoon Island.
New Moon Island has the same thing happened to it - its name is kept but it's respelt as Newmoon Island.
Iron Island remains. Iron Mountain remains. Pal Park remains.
Here are the names for other in-game characters.
The Mom character is named Johanna.
The main boy character (Kouki is his Japanese name) is Lukas.
The owner of the PC System is named Bebe.
Now the names for the Gym Leaders.
Hyouta becomes Roark.
Natane becomes Gardenia.
Sumomo becomes Maylene.
Maxi becomes Crasher Wake.
Melissa becomes Fantina.
Tougan becomes Byron.
Suzuna becomes Candice.
Denzi becomes Volkner.
Here are the names for the Elite 4 members.
Ryou becomes Aaron.
Kikuno becomes Bertha.
Ooba becomes Flint.
Gyou becoms Lucian.
Shirona becomes Cynthia.
Here are some other names.
Team Galactic's Boss who was named Akagi is now named Cyrus.
Galactic Admin Mars is now named Galactic Commander Mars.
Galactic Admin Saturn is now named Galactic Commander Saturn.
Galactic Admin Jupiter becomes Galactic Commander Jupiter.
Momi becomes Cheryl.
Miru becomes Mira.
Gen becomes Riley.
Mai becomes Marley.
Baku becomes Buck.
Battle Tower Tycon Kurotsugu becomes Palmer.