As soon as possible being, in this case, already. Francesca Reyes, Editor-in-Chief of Official Xbox Magazine, has already played through the entire Halo 3 single-player campaign, and her ten page review will hit the streets in the next edition of OXM, day and date with the game.

Technically nobody's supposed to say a word about the game, but GamesRadar managed to get her to say a few words about how she felt after she finished playing:

I think I was kind of in a state of shock for most of it, especially after I finished the campaign. I was happy, yes - but it didn't really hit me until I was back in San Francisco and eating a big bowl of ramen at some neighborhood joint. I sat there at the table with my bowl of ramen and a copy of Wired (the one with Master Chief on the cover which I bought for the flight home) - and I thought to myself: Wow. I can't believe I just did something that hundreds of thousands of people have been waiting years to do.

Thanks Major Silva for the heads-up in the HBO forum.