Here are some excellent Adventist sites to check out:
http://theadventistforum.yourlivecommunity.com/forums.html
SDA forum with many members
http://www.maritime-sda-online.com/forums
SDA forum with over 1000 members in forum
http://www.amazingdiscoveries.org
Dr. Walter Veith site. Powerful series on the endtime issues (Total Onslaught and Transformation) and the creation vs evolution (Genesis Conflict).
Know of any others...