We have an Impulse Control Forum over at Sober Teen that has a few threads about cutting that might interest you.
http://www.sober-teens.com/forums/forumdisplay.php?f=35
I think cutting in general has less to do with the act and much more to do with the 'cycle' involved in cutting. For most, the cutting cycle starts with a 'trigger', which is usually some kind of stress and/or intrusive thought. As the anxiety builds the urge to cut happens. Cutting is then done, which provides the person a sense of relief or escape. After the act a number of feelings can come up...from guilt, to shame, to confusion.
Are there any specific questions you may have? What do you think about what I posted above?
-pedagogue