Okay, the Verizon installers came out and set things up today. They ran a short coax cable from the outside box (where my fiber terminates) into a splitter, then disconnected my DirecTV lines and connected the cables they used to get to the STB's. Kind of interesting - they had to use special splitters that actually have circuit boards. This is not simply a video signal, it's IPTV. Every connection got tested and retested, and the signal was so strong they had to put an inline widget to reduce it by 3db. Too strong a signal could give the STB's a meltdown.
We had a little issue getting the STB's going. Evidently, the "server" that they connect to had a failure, and the whole country was down. One server? Kind of scary, that.
After it was connected, I went ahead and set up my TV signal in Media Center, and selected Cable this time (used to be satellite). I saw two FIOS selections - one with (Digital) at the end, and one without. Digital gives you all the available stations, and not picking digital just gives you channels 1-49 (local stations). Except for some sound issues, everything went fine. It turned out that the moving around of the Vista box loosened a wire from the sound card, and after I shut down and opened the box I found it, fixed it, and restarted.
One cool thing I found was that all the scheduled recordings were reset to point to the correct channels. That was a nice surprise. So now I've got fiber for phone, TV, and Internet service, and I won't lose my TV signal every time we have a storm. Sweet.