The weird thing is, those setups aren't ideally suited for what we do anyway. Yes they process multiple signals and boost the signal, but contain no shielding at all. You'll get lots of bleed and noise when using multiple signals on those massive units (a lot of them anyway).
Radio Shacks 1 to 4 bi-directional signal booster is about $50 but works great. I have two of them boosting the signals in my house now. I actually need to get another one, but am seriously considering the one daMaddColobian posted above