I often get to hear people say they don't need Photoshop because they "GET IT RIGHT IN THE CAMERA".  When I do, I can be sure that it is most likely a novice, someone that does not shoot for a living, or a relative.  Getting it right in the camera entails setting the camera to achieve the best possible exposure, the subject is properly lit, and the background is exactly what one desired.  If all things are done to your ideal, you have it right in the camera.  It does not imply that you do not need a photo editing program, because unless your pictures are going to be viewed in the camera back, some adjustment is in order.  Shooting to get it right in the camera gives you a file (JPEG or RAW) that can be used "as is" or is easier to work with in your editing program.  Mistakes made at the front end are not always salvageable, and should be avoided.

Very minor adjustments will be needed to make your images work on the web if your output JPEG file is set for SRBG.  Color correction, contrast, saturation, and sharpening may or may not be needed to make the image its best.  The program of choice for this can be made by your camera's manufacturer (Nikon, Canon, Pentax, etc.) in which case they may preconfigure the out going file for you in a way that makes an average picture look very good but average, or let you make a few minor changes which will improve that average looking picture.  Any program that is putting out a file that is viewable on the web is creating a JPEG image as its final output.  Earlier camera software let you output a TIF file, but they are for print making and not web use.

More advanced photographers tend to want more control over the final image and tend to use the more advanced programs ala Adobe Photoshop or Gimp.  These programs allow manipulation over the full range of the camera's or scanner's sensory input , 12 to 14 bit depth resolution vs. the 8 bit of a JPEG image.  The input file generally used for these adjustments is a RAW file.  RAW files contain the full information the camera sensor recorded.  Photographers that are used to shooting JPEGs often have a hard time when they start manipulating RAW files.  This is because the sensor image has not had the benefit of the camera maker's tweaking applied and you have to start from a clean slate.  JPEG images have not only had some tweaking applied, data has been thrown away in the creation of a JPEG image. 

Ultimately, it doesn't matter whether you shoot in RAW or JPEG, provided you take time to learn the limits of your equipment and shoot to get it right in the camera!