As some have noticed, a bunch of beta screenshots have been leaked on a German website, showing screenshots of several parts of the game, including the track mode, the main menu and some in-race screenshots. First of all, this is a 'leak', and it breaks the Non-Disclosure-Agreement which the beta testers have signed, and second of all these screenshots do not represent the final version of the game, but only the beta version. That said, it isn't illegal to have a look at them, although they will probably soon be removed from the website they are hosted at.
The link? Find it yourself ;)
Edit: Even if you don't get to see the leaked screenshots, I have made a bunch of new official screenshots available in our PCM 08 screenshot album.
