The issues with THR.US and APS. - seem to only happen from "Bell South (now ATT - DSL)."
If you are having issues getting to THR.US or APS - and you have "Bell South" - CALL THEM - AND TELL THEM HOW YOU FEEL ABOUT THEIR LACK OF SERVICE.
So far they've just been blowing us all off.
If you have this problem from any other ISP - except "Bell South" - please post here.