Re: Routers... in Space!
Three reaons against that immediately spring to mind:
1) Where are you putting these relays? They would either be in orbit around a planet, or in a sun-orbit similar to a planet orbits. Orbital mechanics means that they wouldn't be in alignment very often (so right now, Jupter is pretty close to Earth, but Pluto is further away from Jupiter than it is from Earth due to it being on the opposite side of the Sun, while Jupiter is currently on the same side of the sun as us. We're currently closer to Mercury than we are to Mars)
2) Power, as someone else has already mentioned - how long would these things last?
3) Interplanetary comms relies on a massive dish/array at one end (for ease of logistics, we tend to keep that one on earth), and a small dish at the other - massive dish to be able to hear the feeble signal coming back from the small dish in space, and powerful enough to blast a mighty signal out that will stand a chance of being heard that far away. A relay comms satelite in Jupiter wouldn't be powerful enough or have a big enough dish to talk to a probe near Pluto, even if it were halfway between Earth and Pluto.