Coming Soon: 

Seen On TV have announced that they will be launching at 10am on Wednesday 12th June.

They will be on channel 79 on Freeview, which probably explains the current lack of service from Earthx TV on that channel.

Update: Ultimately, Seen On TV launched on channel 94 rather than the previously publicised channel 79. However, Seen On TV uses the same Service ID as EarthxTV, so there was possibly some sort of arrangement to buyout EarthxTV's franchise on SDN in order to launch on Freeview.