The Guardian's video game reviewer Greg Howson has already gotten a hands-on with Mass Effect, but he can't talk about it until later in September because because of a NDA (non-disclosure agreement.) However, in his blog he reveals that the game soundtracks were "reminiscent of Blade Runner era Vangelis" and "synth-tastic."
Howson can hardly contain his excitement and also praises the character models and facial expressions in the game. He writes that he is "now looking forward to this game more than any other this year." We'd have to wait until the end of this month to read his full article on Mass Effect.