I just added a technique sample: A Brenizer multirow Panorama. Please check it if you are interested in this technique. I thinks it's a good way to get a cool retro-analogue style with little depth of field.
Another good thing is the high resolution. If you have to print very big posters, this is sometimes the only way to get the needed resolution.
1. Choose the motive you want to shoot.
2. Be sure that you are relatively close to your subject and mount a lens with long focal length and big aperture.
3. Focus on your main subject, then turn off autofocus. You also have to switch to manual mode and set the white balance. If you don't, your pics won't be constant and it won't look good in the result.
4. Take the pictures of your subject. You can do it in a regular way like rows or shoot by luck. But I recommend you too shoot with a strategy, otherwise later you'll miss an important part of the picture.
5. Turn on your computer and assemble the pictures. You can use photoshops Photomerge or any other program you want to use. This will take several minutes if you shot in high resolution.
6. After assembling, you have perhaps to do a little retouch of stiching mistakes. After that the pic is reday for deviantart