What happened to Domain Mapping?

Everything has been fine with Domain Mapping until this morning. Now all my Multisites are just spinning and not loading. To verify that Domain Mapping is the culprit I renamed my Plugin folder and the problem stopped -- but naturally it just gave me my base URL 505575.com. So, I named it back and got the spinning theme load problem again. So my next step was to rename EVERY Plugin in the Plugin directory except for Domain Mapping and the problem continues... see http://www.abq1.com/ http://soundslikedrea.com/ etc...

If it's not domain mapping... and the problem is not really the plugin... but the problem goes away because domain mapping is not pointed at the target URL anymore... I'm having trouble imagining what else could be zapping these sites... curiously enough... several other sites in the multisite ARE displaying correctly. i.e. http://thinkpainaway.com/ http://www.holistichealthseekers.org/ so as I think this through more... it can't be Domain Mapping because those last sites are using the same process... Any IDEAS would be greatly appreciated! I've turned on support so you can take a peek.