I am buying an XM Roady and saw this promotion and thought I would pass it along. The promo is for a free home adapter kit (a $60-$70 value) mail-in offer that expires 12/31/03. I think you can get the home adapter offer no matter where you buy the Roady. Here is a link (I am not affiliated in anyway, just a good website) to check it out http://shop.store.yahoo.com/xmfanstore/dexmrosa.html

Per the www.xmfan.com website, the Roady's antenna can just be put on dash (I am sure the quality of reception varies by area), it can be moved from car-to-car, and apparently indoors with the home kit.