The official Zoids site has been updated for the 30th anniversary of the Zoids franchise:
http://www.takaratomy.co.jp/products/zoids/index.html
It features the GREE game, HMM line, MSS line and "Zoids Original" concept art for many designs seen today.
This site overhaul has also been advertised in the Dengeki Hobby Magazine. The "reboot" went live on Monday the 25th of March.
Also of interest, is the Zoids Original lineup:
http://www.toyhobby.jp/common/special/zoids/lineup.html