Warning: Spoiler! (Click to show)
When all fails, you can use rubbing alcohol to clean it. I've gotten stains out of suede before but it left the leather kinda sorry...
This. Step one, use a clothes brush and see if you can brush the stain out. Step two, blot the stain with rubbing alcohol. This works more often than not for me.
I'm about to go down to the local drugstore and buy a box of alcohol pads so I can do better stain checking in the field.