For any advertisers that pause ads and recently tried to unpause them (resume ads) there is currently a problem - your ads may not be live even though you think they are :)
I unpaused my ads over 2 hours ago and still no ads are being displayed. I called Google and they said they are aware of this problem - so check your ads if you ever pause/unpause.
AdWordsAdvisor
4:33 pm on May 12, 2006 (gmt 0)
You beat me to it, bostonseo. ;)
Latest update: I don't have precise timing, but word has it that things are now catching up and heading towards normal.