Satellite radio carriers hope to make their services the latest must-have travel accessory with new partnerships announced this week. AirTran Airways, a budget regional airline mostly serving the East Coast, announced Wednesday that it will become the first major airline to offer satellite radio programming on all of its flights under a new partnership with XM Satellite Radio. Rival programmer Sirius Satellite Radio, meanwhile, will try to grab travelers on the ground with a new partnership with W Hotels, which will stock high-end suites with Sirius receivers.