Rebecca, who is the force behind all this, has even uploaded a vid of the 'chicks calendars to YouTube (probably NSFW) for your previewing pleasure.
Someone else uploaded the same thing for the 'dudes. I initially hesitated to link to it, but what the heck. It's Friday, and I'm in a good mood. So here you go, the Skepdudes calendar in video form (yeah, again, probably NSFW). See if you can spot the astronomer in there.