Oh wow, this thread took off! I'm in full agreement about the scale issue. As it sits currently, it only looks like it can hold maybe a hundred passengers. Also, I'm just building this guy freehand with no current cargo pod as a reference. Just for the sake of getting this to a state where everybody could be happy with it. In regard to Life Support, I was going for a self contained system on the pod, hence the vents and scoops on the aft end of the model. Already the model is fairly stubby, so expanding on the Life Support section should be pretty simple.
As far as the billboards go, I leave that to the various sig artists out there. I figure there are 5 houses, so 5 variants are needed and each could get a board advertising their local ship manufacturing company. Unless anybody has an idea to link a rolling sig into a texture, then each pod could have several advertisements on a rotation and the beginning of TV in space. Imagine being able to link say a very short xfire or fraps video to said billboard.:DI won't waste any more time on speculation there.
Also, if anybody happens to already have a cargo pod in any format Metasequoia supports, could I "borrow" it? My milkshape trial has expired and not to mention I'm having massive import/export complications...