And your fermenter is too slow. Do you usually get sugarcane/plantballs backed up in the fermenter, or is it usually empty? Maybe lower the power to your still to balance that, if need be.
I will assume that was a question, asking me to explain my setup in more depth. Certainly:
Start with a 9x9 square of dirt. Cut out the proper holes to add sugar cane (
http://www.minecraftwiki.net/wiki/File:Efficient_Sugarcane_Farm.png), and then make three more of the same so you have four dirt squares.
From there, you need to then get to the sky limit and build the same design right over your one at the bottom of the world, and then fill the holes with water. It will create a bunch of waterfalls.
Now, program a computercraft turtle to move upwards until it cannot move upwards any longer, placing cane on every first layer, and dirt (ending the layer) on every fourth layer. Make a dozen turtles so this goes by much faster. Portal gun portals make getting up to the top much easier if you don't have mystcraft.
You now have four massive sugarcane towers. You can set these up to use the sugarcane harvesting farm block to get every two levels.