While we still have no idea if Square Enix will be releasing this to the international market or if there is even a big enough market to warrant its online Wii subscription-based service… in Japan the company has released a 37 and a half minute preview video for Dragon Quest X which resulted from its Dragon Quest X Direct Broadcast on the 30th July.
This video clip includes commentary from several people including series designer Yuuji Horii, producer Yousuke Saito and director Jin Fujisawa. Taken from the games beta test, this shall provide you with easily the most indepth look at the title.