Awesome Web Apps: Animoto
This web app really fits the description of "awesome". Animoto let's you make music videos with pictures, but in an amazing way. Just check their sample video when you enter the main page and be amazed.
It takes very little effort on your part to get your video going. Just upload your pictures, upload the song and let the app do the rest. By the way, no two videos are the same! So you can take the same pictures with the same song and get something different every time. When you're done, you can share the link for the video with your friends and in some cases even download it. There is a small fee to pay for full-length videos, but I think it's totally worth it. I encourage you to play around with the 30-second videos. You will definitely enjoy this awesome web app!