As someone who likes all thing digital this is a new field.
SIRIUS Satellite among others are making for the Canadian market. SIRIUS has partnered wtih CBC to get into the market and support their application to the CRTC.
SIRIUS and XM are well established in the US as providers of many high demand radio programs. Most notably getting into the Howard Stern controversy but also providing access to National Public Radio (NPR).
Whether the transition to Canada will bring the same type of selection that has become the standard in the US is the key question. Previous US to Canada moves have involved ‘watering down’ the content to meet the CANCON rules for local content.