Our product ships with MongoDB and the user has no administrators to handle roling of log files etc. This means all maintenance has to be handled by our product.
It would be a lot easier of MongoDB supports automatic rolling of log files based on date or file size etc. instead of us having to set up a scheduled task programmatically when installing.
It is related to this request
SERVER-5325, which you rejected, but I feel the rejecting is based on an assumption that MongoDB is used in environment with dedicated MongoDB ops people which is not the case in our situation.