New information about the BW2 global link. The services linked to global link will be off between 5 to 21 of June. This include the global link and RATED Random match. You won't be able to synchronize too. There will be some news on the site.
-New pokemon on some old areas.
-Time between global link entrance will be reduced from 24 hours to 20 hours
-New area named Cold cave (japanese translation, not an official name).
-New furniture and house.
-If you register a Pokémon black 2 or white 2 with your Black or White, you can have acess to a special promotion not detailed yet.
-Global Link will have a "new" feature: acess to GTS informations, just like the old Gen 4 GTS site. It'll have your info, and info about other people.
One last thing: If you don't enter on your Drean World for 100 days, You'll start losing your berries until you stay with only one. this berries will be turned into points to your dream world.
http://ja.pokemon-gl.com/renewal2012/
http://www.pokemon.com/us/pokemon-news/pgl_maintenance_2012-2012-05-01/
My personal opinion: The new Global Link looks great to me, and this cave should have all cave and ice pokémon that we don't have yet. List of pokémon with Hidden ability that we don't have yet:
Beedrill family (Sniper)
Arbok family (Unnerve)
Sandslash family (Sand Rush)
Clefable Family (Unaware)
Parasect Family (Damp)
Venomoth family (Wonder Skin)
Dugtrio Family (Sand Force)
Golem Family (Sand Veil)
Muk Family (Poison Touch)
Steelix Family (Sheer Force)
Electrode Family (Aftermath)
Marowak family (Battle Armor)
Pinsir (Moxie)
Ditto (Imposter)
Snorlax family (Gluttony)
Articuno (Snow Cloak)
Zapdos (Lightningrod)
Moltres (Flame Body)
Mewtwo (Unnerve)
Meganium Family (Leaf Guard)
Typhlosion family (Flash Fire)
Feraligatr (Sheer Force)
Togepi-Togetic (Super Luck)
Ampibom family (Skill Link)
Forretress Family (Overcoat)
Dunsparce (Rattled)
Shuckle (Contrary)
Heracross (Moxie)
Weavile Family (Pickpocket)
Swinub-Piloswine (Thick Fat)
Raikou (Volt Absorb)
Entei (Flash Fire)
Suicune (Water Absorb)
Lugia (Multiscale)
Ho-oh (Regenerator)
Beautifly Family (Rivalry)
Dustox Family (Compoundeyes)
Shiftry Family (Pickpocket)
Breloom Family (Technician)
Ninjask Family (Infiltrator)
Exploud Family (Scrappy)
Probopass Family (Sand Force)
Aggron Family (Heavy Metal)
Roserade Family (Technician)
Swalot Family (Gluttony)
Zangoose (Toxic Boost)
Seviper (Infiltrator)
Glalie Family (Moody)
Froslass (Cursed Body)
Walrein Family (Oblivious)
Regirock (Sturdy)
Regice (Ice Body)
Registeel (Light Metal)
Kricketune Family (Technician)
Rampardos Family (Sheer Force)
Bastiodon Family (Soundproof)
Vespiquen Family (Unnerve)
Garchomp Family (Rough Skin)
Riolu (Prankster)
Abomasnow Family (Soundproof)
Dialga (Telepathy)
Palkia (Telepathy)
Heatran (Flame Body)
Giratina A (Telepathy)