i just found this as well… i dont know, made me LOL. i can see comments about going in a cartoony direction or whatever, but i think that’d be a whole different piece, this is what it is…
the facial expression on the girl is priceless and really captures that 1950s softcore porn style that also goes well with the mummy theme and the action being depicted and the fairly direct pseudo-realistic rendering style, and also the humor fits all those other elements. it all comes together really well for me. mind you, i think its amazingly kitschy, but then, given the sort of art i make myself, i cant say thats a bad thing
its a shame they dont really do those detective novel covers like they used to, i would love to see your take on that theme.
as far as hardcore serious crits, if she’s dusting, i agree with the other comment, its too clean. make it actually dusty, put some cobwebs around, dust bunnies on the floor, etc.
also i think the composition itself is a bit static. i hate to suggest this, but maybe more of a straight-on ass shot? or a bit lower angle? something. maybe more of a profile for that matter. this angle is kinda boring. certainly compared to some of your other renders its just not as strong of a composition somehow. maybe a shorter lens, this looks pretty telephoto but if you were actually shooting indoors it’d probably be a wider angle lens. that might help convey a cluttered basement/tomb feel more as well.
the hair shape is good but its a bit obviously opacity mapped planes that are all one piece. the shader has too broad a specular hightlight, or maybe not enough diffuse in the dark parts, the highlight goes right across and makes it obvious its not separate strands of hair right now. it could use even just a couple stray strands, maybe some paintfx via maya hair over top of this, or refine the map, that would really help sell it… if you havent played with it, maya hair is actually pretty damn nice and user friendly way to do longish hair, i think opacity mapped planes are getting to the point of not being needed any more.
also, finally, the shadow edges seem way sharp for how soft the apparent light sources are, most noticably on the crates in the background… what are you casting those with? it needs to have some softness to the shadow edge… like a raytraced area light would give, i’m not trying to tell you how to light your scene, just an example that came to mind 
the mummy looks amazing though. i thought the smile was just right. subtle enough to miss at first glance, but plenty obvious. i mean, he COULD just happen to always look like that and its a coincidence that he appears to be smiling while the chick is dusting his bits… thats the thing that validates the whole piece to me. its NOT because obviously this was made intentionally, but its POSSIBLE. and of course the girl, nobody needs to comment on your girls, you got it down… in particular the white fluffy fabric, i have never before seen attempted in cg, and its perfect. also although all your girls are beautifull, i think this version is a bit less generic than some of them, i personally think shes one of your better ones.