I actually use those tunnels only for liquids. I supply a refinery, compression dynamos, TE portable/BC/railcraft tanks and a carpenter. It's not as precise as the logistic pipes liquid provider/supplier/satellite but works fairly well. Maybe you could use a liquid provider pipe as target for the tunnel and have it (the pipe, not the tunnel) provide the liquid to a liquid satellite pipe in LP autocrafting. Actually those two mods work excepionally well together.
To pump liquid from tanks into the tunnels you still do need some kind of piping. The tunnels do not actively pump out of tanks.
Another drawback is, that you can only have one input point for the tunnel. So if you for example want to store mob essence from a monster farm and a sewer into one tank you have to set up two tunnels (or connect both with pipings first).