Pokemon Sunday had revealed a new Pokemon, Yanappu. A grass Pokemon seen earlier as a toy in a Japanese message board (2ch). Yanappu knows a new move called "Acrobat" used in triple battle's to attack any opponent  in battle. Yanappu also has an ability known as "Gluttony".

The official web site, Pokémon GTS, will be closing on September 14, 2010.  The announcement specifies that although the website will be closing, the Global Trade Station found in the fourth generation will still be fully functional. 

Source: http://www.pokemon-gts.net/info_close/en-US.html

The Enigma Stone event, which unlock's Latios and Latias is a wifi event that is available for Heartgold and Soulsilver. Each Pokemon is revealed to a specific version (HG or SS). This event last from July 31st 2010 to August 27th 2010, and is available for the following countries: The U.S, Europe, and Austrailia. The way to obtain the Pokemon is fairly simple, you first head down to the Pewter city Museum and you'll recieve the Soul Dew, and the Latios or Latias will appear outside of the Museum.
 

A new legendary Pokemon was revealed on Pokemon Sunday, referred to as Victini. Currently number #000 on the Isshu Pokedex. An event set on September 18th 2010 to October 18th 2010 allows user's to meet Victini in the game, via Nintendo Wi-fi connection, through the Liberty ticket revieved during the event.

Credit for the picture goes to http://floatzel.net

The next Japanese Wi-Fi Event, Ash's Pikachu, now has a confirmed level, move set, nature, and held item.  It will be at level 50, holding a Light Ball, with a Naughty nature.  The move set will be Iron Tail, Volt Tackle, Thunderbolt, and Quick Attack.

The event will start on July 15, 2010 and will be available for Japanese copies of Diamond, Pearl, Platinum, Heart Gold, and Soul Silver.

Source: http://www.pokemon-sp.jp/news-sp/2010/07/0709_01.html?a001=news

Credit to forum member Nigoli for bringing this new information to my attention.

According to an advertisement promoting the current Japanese Wi-Fi event, Goon Scizor, the next will be Satoshi's Pikachu.  Satoshi is the main character from the anime, where he's elsewhere known as Ash Ketchum. 

The event will start on July 15, 2010 and will be made available to all Japanese copies of Diamond, Pearl, Platinum, Heart Gold, and Soul Silver.

The advertisement can be seen here.

Thanks to forum moderator Guested for the notice, and for Serebii for showing the advertisement to Guested.