Here are some reception questions and rambling notes, all pretty trivial but possibly of some interest to techie types. a. Q for anyone: Re reception, when using XM in the car and the signal is blocked by a bridge or mountain, and once the signal is recaptured, why is there then a dead echo? Seems like there is some sort of time shift delay in the reception, but not being a satellite junkie, it's not clear to me why this happens. Just curious. b. Note: I drove up to Nova Scotia and Newfoundland last month and took along the XM. I had earlier asked XM tech support how far across the border did the signal stretch in the northeast, but I only got a standard legal line of 50 miles and everything complies with international broadcast rules etc. Anyway I got a strong signal clear across New Brunswick, Nova Scotia and out to Cape Breton. Only when we got to southern Newfoundland did the signal start to flutter; interestingly, it was ok at the lower channels and nil at the higher channels (anything above On Broadway, I think that's 23 or so), why?? As I drove further north and east, the limited reception then dwindled further. By the time I got to St. John's, I could barely bring in the preview channel on 4. Don't know if the limiting factor was the northerly or the easterly stretch, I think it was the latter. C. Q's Just wondering...Does anyone have a footprint map of the XM satellite reception area and of the active repeater nodes? Also, what is the USB port on the Sony intended for?? D. General reaction...we have Xm for about half a year now, great reception and quality here in S Florida, listen in both home and car with Sony pnp model...Main gripe is the frequency of Xm promo's on the commercial stations. You have to wonder if these will flip over to paid advertising once the listener base hits some magic number, who knows when. Main concern is whether their positive cash flow point will happen soon enough to prevent them from burning through all the investment capital with what appears to be a hefty monthly operating overhead; meanwhile let's enjoy the good service.