Those are really just plain/simple blogs, I went for speed and not really to high of quality. There is 1-2 plugins installed only (akismet for spam, All In One Seo for baseline seo, but I dont even have that activated on most of the ones I did there).
What makes the galleries is
UUGallery (ref spam) which I swear by and use on anything I'll spend much time on that is Wordpress.
Took about an hour maybe to set a theme up to function across every girl's name, I picked one with changeable header/color/layout (which happened to be the wp default theme) and actually hardcoded the links to other girls right into the sidebar so I only update it once and it adds the rest of the girls.
I spent maybe 2 nights building those 30ish and had all the text already done in txt files, installed UUGallery and built a template that fit the theme nice, and started banging off sites.
Using the multiuser you can add any theme, but I wanted to streamline per niche, so all the pornstar blogs will be on that theme, I'll do niches probably to, and keep the related niched sites together. They are a different approach, they are all linked to each other via the theme itself so as the niche list (pornstar list) grows so will the links to it on each.