Date: 10/23/2008 7:48 pm EDT
Walking on raw Avaire tile shouldn't be an issue. Moving heavy objects over the ungrouted tile wouldn't be a good idea however.
All tile installations should have an expansion gap at the walls of about 1/4". If you choose not to remove the existing baseboard then quarter-round or shoe-mold would be in order. Some people want to grout the tile tightly to the existing baseboard but that is never a good idea.