I have been a frequent user of Animoto for quite some time. I use it to do my new releases videos for the library and for my classroom. It's easy to use and doesn't take much time. I found another site that does a very similar thing- Stupeflix. Stupeflix lets videos and images merge to a video using music.
I made a test video, and it went really fast. I added photos and then I selected music from the website's built in library. It is very similar to the music on Animoto. Photos can be uploaded from computer, caught from the webcam or pulled from an online storage (flickr, instagram)
There is a free version as well as a paid version. I did the free version, got a minute of video which for a new releases presentation is sufficient. I felt it was a fairly easy to use program as well. Simply create an account, and make a free video. Once you do that, you can actually send it out to Youtube, Vimeo and others.
It seems like a pretty easy site to use. It just took me a few seconds to make a video. It is worth looking at.