Most of the current spec satellites have multiple LNB's which are multiplexed across multiple ( usually 4 ) outputs...
In the case of DirecTV, the HD Dishes that are available now actually have 5 LNB's ( to acquire signal from 5 different satellite elevations ), but 4 outputs. Each output has signal from all 5 LNB's.
Again, in the case of DirecTV, the dual tuner DVR Boxes they have require 2 Feeds from the satellite... one for each tuner. Each tuner has full access to the signal from all 5 LNB's across it's own cable.
I've been told that Dish network Dual tuner boxes do NOT require 2 coax feeds, but I cannot confirm this from personal experience.
I believe that the '09 Landmarks have the same Cable wiring as is in my '08 Landmark. If this is indeed the case, I have written a fairly indepth article on providing 2 Sat feeds to both the Living room TV, and the Bedroom TV area. This way, you could use a dual tuner DVR device in both locations. You can find this article in the 'HOOT' (
LINK) This article assumes you will be using an external satellite dish, and NOT a roof mounted unit. If you go with a roof mounted unit, you will indeed need to run additional wires, but this can be done smartly and without much hassle.. ( ask me how if you need to ).
I hope this helps. Please feel free to ask any questions you may have about the article, or the Sat wiring in general.
Thanks,
LK