It wasn't too hard to see this one coming after reports of "financial difficulties" and a potential early demise starting cropping up last month, but it looks like AT&T's CruiseCast in-car satellite service is now officially done for. According to RaySat COO Mike Grannan (AT&T's partner in the service), all new activations have now ceased, and existing customers will soon apparently be able to get a refund for the cost of installation, de-installation, equipment and service. For those keeping track, the ser