One of the reviewers (I forgot which publication) said that in the 50 hours they played, they didn't come across any kind of plastic surgeon, or other shop where you could alter your appearance. Although I do think one of the developers mentioned that you would be able to change your hair style somehow.
But, good news for PC players ... as
@Kyros007 noticed, there is a
save.dat file that is made with each save. The file is in binary format, but if you open it in a hex editor (such as the free Hexinator) and scroll to the bottom, you can see text references to each of the body customization options. I haven't taken the time to nail down the exact encoding, but I'm almost certain that the raw value for the slection is stored (e.g. when customizing your character, each item is either a color or a range of options from 1 to n). Adjusting these values in the save file should change your character's appearance.
I haven't tested this yet, and there may be some integrity checks that need to be noticed and addressed, but I don't think it will be long before a save editor is available.
Other things I saw when looking at the save file:
- item data
- weapons
- stats (and what looks like a possible array with perk levels)
I think the text metadata file is just a read-only summary of the save data. I don't think it is ever read or used by the game when loading a save file, so I don't think making any changes to it will affect anything.