How about making events, such as the week long Vehicle stimulus events.. but change up the map instead.
Possible Ideas:
*Rotate home conts for a week
**Replace the BI with old Oshur for a week
**Enable the BI rules found here For a week:
http://forums.station.sony.com/ps/p..._id=88000020028
*Maybe lock some conts for a week?
*Or lock all caves for a week?
Wouldn't hurt and might be fun.. especially the ones with double asterisks