XM is running a promotion for the Pioneer Inno now, allowing for $100 off for a limited time. Sure there's the regular terms and conditions (such as a 6-month service commitment) but the deal is pretty damn good.

So anyway, to find this deal just go here and enter this coupon code:

XM Promo Code: 2PRK2S4UE

Offer good while supplies last. 

Thanks Jonathan!