The FAO has started a new monthly report of the global cereal situation and outlook.
From the FAO: World cereal stocks for crop seasons ending in 2011 are forecast to fall sharply because of a decline in inventories of wheat and coarse grains. A plunge in stocks of coarse grains at the global level as well as for major exporters is expected to push down stock usage ratios of coarse grains to the lowest in three decades. (This is because of corn ethanol programs.)
I've put together a single chart showing current global stocks to use ratios from the report:
Note that stocks-to-use measures excess supply against demand