I'll try to crank them out your ideas as I have time. Stuff for my gaming group has priority, but the GM isn't too demanding right now.

I just finished up the airlock module which was more of a hassle than I thought. I wanted to make it where you could see the "outside" of the airlock as well so I extended the module outside. I also wanted the "outside" to be seen through the viewport. Since .jpgs don't support transparency, the airlock module is a .png file. It comes complete with changing rooms and two environmental/vacuum suits.
Click image for larger version. 

Name:	Airlock Module.png 
Views:	525 
Size:	321.1 KB 
ID:	10980

For access to the outside, here is a ramp [the base sits about a half-level off the ground].
Name:  Ramp.jpg
Views: 2972
Size:  9.3 KB

And for those of you who like mega-bases, here are the connector pieces:
Name:  Connector (2x1).jpg
Views: 2908
Size:  12.0 KBName:  Connector (2x2).jpg
Views: 2877
Size:  23.2 KB
And an example of how they would work:
Click image for larger version. 

Name:	Connector Example.jpg 
Views:	382 
Size:	1.07 MB 
ID:	10986

As always, comments and criticisms are welcome. Feel free to be nitpicky, I can't see everything.