If you choose to use co-sysops, choose them around the globe so the daylight hours keep one available.

I think a few of us bad typers would like you to give at least those co-sysops edit message ability to fix our worst obvious errors.

Another idea: We often write chatty messages that are fun but do the message database little value. Maybe a message posting option to declare the message a post and delete after 7 days?

aka j