I use a Nikon D200, digital SLR camera, and I shoot in RAW and JPEG format.  What does this mean for you?  Well, let's talk about the benefits of digital to start.  

Most headshot photographers have gone digital, what with the demand for color headshots and the affordability of digital color prints.  But aside from reproduction values, shooting digital in the field enables  me to "check" our shots, ensuring that we are getting the looks you want!  It also means I can take tons of pictures of you without worrying about film.  

As for picture formats, RAW files have more depth of color, meaning that the shots really stand out.  I also shoot in JPEG, which is what you will receive on your personal picture disk.  Then, you pick out your faves and I touch them up in RAW,  turn them into TIFF files, and you take them off to your trusty printers to have them reproe'd.  It sounds complicated, but basically what it means is that you get outstanding pictures, with true, vibrant colors.