We're aware some groups are currently experiencing technical issues.
The engineering team has identfied the problem and we are currently in
recovery mode. Some groups may continue to experience message delays
or error messages over the next three hours. If it looks like this
issue will persist longer than that, we'll post an update to the
Groups Team blog: http://blog.360.yahoo.com/y_groups_team

Thank you for your patience,
Jami Heldt
Groups Community Manager