I want to be able to make a goal which automatically looks at the status of my other beeminders to automatically determine status of the metabeeminder goal.

Allow the user to select from options such as sum of goal values, number of on-track beeminders, or number of derailments. Then allow the user to select which of their beeminder goals are included.

As an example of a case I would use it for, I lift weights. I have a beeminder which I use to keep track of the total weight of my bench press, deadlift, and squat. I fill it in manually, but I would like for the total to be able to fill in automatically.