Need a little more info. Do you have more than 1 Voom STB? Do you want to watch different channels on two seperate TV's? Are you using a diplexer? If you simply want OTA in the bedroom, you can split the OTA cable and run additional cable between the split and your bedroom TV. Essentially--just attaching the OTA antenna to your bedroom TV.
If you want Voom in the bedroom along with the locals, and you have 1 STB, you can use the coax-out on the STB to a multiplexer, and run coax to the bedroom. You have to watch the same thing on both TV's unless you have a second STB, and will probably need a remote extender to control that. Or...get a Universal remote that lets you control 2 TV's.
If you have a second STB, then you would split both the OTA and Voom feeds and run lines into the bedroom.
Sure. Before you start slicing up cables and changing connections, maybe you should think about a seperate antenna for the bedroom TV. Depending on your location, it might be a lot easier to do that. The RatShack guys are pretty good sources for info like that, and they would be familiar with what works in your area.