Someone did post pictures of their car after having a sun/moon roof put in (do a search, i'm sure you'll find it). I don't believe there's anything Prius-specific out there, but a compotent aftermarket installer should be able to get you something that fits and looks decent. Keep in mind that there are no high voltage wires up there, so they don't have to worry about that when doing an install. if you have one done, be sure to post pictures!
I do remember reading somewhere that the shape of the roof might cause complications. I'll have to see if I can find it again...
I thought there was a post about it here on priuschat.com but the only thing I found was a post on priusonline.com. http://www.priusonline.com/viewtopic.php?t...ghlight=sunroof
The shape of the roof WILL make a difference as it is a compound curve. There were some photos a year ago of a Prius with a sunroof added on. To make it fit, though, they actually flattened the roof and it looks a bit strange. The cost was pretty outrageous, too...about 1200 bucks. Lot to pay to look at powerlines.... Bob