Are there any official & monitored support forums for Google's Admob?

According to admob, the "official" support forum for AdMob publishers is here:

http://groups.google.com/group/admob-publisher-discuss

However, questions haven't been answered by anyone from admob in months; it's like a gho开发者_开发百科st company. Does anyone know why there appears to be no official, monitored, public developer support for AdMob? Is Stackoverflow the only place to get technical questions about AdMob answered now?

Thanks.