If you have poor cell phone reception inside your home (which is very common), and you have a PCS phone, this Cell Phone Signal Booster might be of interest. Particularly if you're one of those cutting-edge types who have jettisoned your land-line and use your cell as your only telephone.
It's a pity it won't help with GSM phones, which I have and find more susceptible to indoor reception problems, but at least it might help some of you. In other words, I haven't tried it, but if the price is right and you give it a whirl, please let me know what you think.