Filling Room s with Sound

For those who have lots of amps and lots of speakers and who move out of the "listening position" ie. stand up, walk around etc. - and - who use receiver capabilities like Integra's "All channel Stereo" or Mono to all speakers having one source played in one more more rooms.

Some of you as I do may have two home theaters in a single source multi-room config. There are a lot of options that these setups make possible. I have found the speaker selection and placement to be the variable of most impact and interest and am interested in discussing that in this thread.