Escape pods are bigger than most would guess.
That would depend on the craft it's originally from. As Mark didn't really say to what ship the pod belongs, he can pretty much do anything he wants 

I would imagine that the Delta Flyer's pod we actually see in Voyager (very claustropfobic) is  a lot smaller then, say, the Galaxy's.. that said, I personally prefer the first concept shown here, it looks great.
...
1, How hard would it be to make a Delta Flyer  (or any shuttle craft for that matter) bridge?
2, are there any plans to make a Delta Flyer bridge?
You know, I've been thinking about having a go at modelling and texturing the Delta Flyer bridge
for some time now, after I'm done with the stuff I'm currently working on. If, say, the guys from 3rd era wanted someone to do it for them, I'd be happy to oblige ;)