Premise: bio-tech golden age where "wetware" is the new IT meta, organic AI that can interface with our standard computing technology. 

In this context, I'm imagining a future technology that would regulate data flow between the brain and external binary data. 

Hyphal sheaths are a key element of mycorrhizzal fungi structure: filaments called hyphae sheathe tree roots, like a sleeve, and regulate nutrient uptake and distribution (among other functions). Fungal brain parasites are common as dirt: I'm imagining an engineered fungal parasite that would be planted in the host brain and translate binary data into neural data, sheathing neurons, nerves, weaving into sections of the brain, with a "plug" to jack into, à la Existenz/Matrix for full sensory simulation or man-machine interfacing.

Just looking for opinions and criticism to make this as credible as possible in a sci-fi setting maybe 100 years down the line.