Maximum Overhang?

[jsondag]

the saline will probably have a resistance around 10-100 Ohm/cm so if you use like 10kOhms for measuring the capacity you won't see a large change.

Good point, I didn't think of the resistance in the "leads" running to the "capacitor". The salt water will act as a resistor in the lead, and will be part of the resistance. As you say though it will be negligible, especially if you place the electrode in the water close to the strip.

EDIT:
I'm assuming we are going to be using an amount of salt close to the limit of solubility, and in your link that comes out to about 4.8-10 ohms/cm for sodium chloride. If you put the contact right by the bottom edge of the strip, you're on the order of an ohm or less to the bottom of the strip. Resistance to the portions higher up will go increase, but again negligible. A wider strip also will help this as there is more cross sectional area of saline to travel through to reach the dielectric interface, lowering the resistance. I also think the current peachy will be able to handle this with maybe just a firmware update as you can either tie into an i2c for comms, or emulate a dripper. I think Rylan said there will be a way to do that at some point.