Friday, Joost released an iPhone app for its service that might be a game changer. Joost’s iPhone app lets users stream and watch any of Joost’s 46,000-plus videos for free.

Say what you will about Joost’s library of content, the concept behind this app is fantastic. The ability to stream a movie, TV show, or other piece of video content on the go is great. I know the technology is nothing revolutionary–after all the iPhone has had a YouTube app, complete with streaming video, since the device launched. Even given that, when you load up Men in Black on Joost, it just feels like a whole different ballgame. This isn’t a video of a dog on a skateboard anymore. This is real, Hollywood-produced content, delivered to your phone, for free.

I have not experienced the major hiccups that very early users, like MG Siegler did, so those issues seem to have been taken care of. I did notice some occassional stuttering of the stream over Wi-Fi. I am, however, disheartened by the lack of streaming support over EDGE or 3G. Joost requires a Wi-Fi connection to work.