The event was held at Akihabara, with Toru Furuya, the seiyuu of Amuro Ray from the original Gundam series and Yuko Ogura, Japanese model as the special guest.
Pre-order has started on SoftBank since May 19th. 73,920 Yen/97,920 Yen (inclusive of tax) - different pricing for different coverage signup and payment schemes. Today (September 10th release).
Images are from Gundam Dot Info.