I was going to suggest something similar.
Right now in the ingame description of a region you can see the following:
Population: 6000 (Current Population)
Economy: (Nothing, they are lazy bums 
)
Gold: 207 gold (Max possible gold income)
Food: 274 bushels (Max possible food income)
And in the wiki you see:
Population 6950 (Max possible population)
I suggest the ingame description to go something along this line:
Population: 6000/6950
Gold: X/207
Food: Y/274
or
Current Population: 6000
Population Limit: 6950
Gold Limit: 207 gold
Food Limit: 274 bushels
And the wiki something like this:
Population Limit 6950
Gold Limit 207
Food Limit 274
I would love to see food production and the like be moved to the external API. Then I could easily have all my food related spreadsheets grab current data from the server. I could even set the whole thing up as a wiki template and everyone could easily have detailed food production information and estimates for any realm. Oh wait, perhaps that is what we wish to avoid
