The best thing you can do is to post your latest error log text file (the entire thing) over at the Tech Support forums. The technicians (and some of the regular volunteers) know how to read those files (the techs have a special tool to read them). They can better pinpoint your issue and get you the help you need a lot faster over there than here.
http://forums.worldofwarcraft.com/bo...Id=11110&sid=1