HDTV's are becoming increasingly better calibrated out of the box. However, if you are a person who is particularly picky about your HDTV picture, but you don't want to pay big bucks for a professional calibration, then you can try the Digital Video Essentials Calibration DVD.......newly available on HD-DVD.
I tried the DVD version of the disc and I must admit that I learned a lot, although much of the material can be very technical for the average user. However, taking some time to run through some of the calibration steps should improve your overall picture. The video takes you through a series of test screens and then gives you an opportunity to pause the disc to calibrate your TV. You will get a brief explanation of each test screen and instructions on what to look for.
Its an interesting DVD to watch if you are a techy geek with extra time on your hands. And although its not a professional calibration, you will learn a lot and should get some improvement in your picture.