The great $77 XM Radio deal is still going strong! I wrote in December about how you can get a year of XM radio for $77 and you can still get this offer. Check out my earlier XM Radio post for a walk-through on how to take advantage of this offer.
Remember that XM Radio and Sirius are now one company. You can get great coupons and deals for new radios and subscriptions at the Sirius coupons page on ShopGala.