Date: 4/12/2008 4:08 pm EDT
You should be fine moving the appliance back into place while the grout is wet. You might need to touch-up the grout if the wheels disrupt the groutline.
The key thing is you don't want continuous traffic/movement on the floor for the first 24 hours.
Send us a picture when its done at SubmitMyFloor@snapstone.net