What AutoAdium does is alternate between 16 (4 groups of 4) away messages for you at predetermined times. Version 2.2 includes a remote feature, so you won't have the preferences window taking up valuable screen space. For more details, be sure to visit the link.
Works with the newer IM client Adium.
What's new in AutoAdium
Huge bug fixed. Multiline away messages now work as desired, and all known saving issues have been fixed. Recommended for all users...