I just want to throw my hat in the crowd and say I highly doubt it'll be > $400
I'm thinking:
25% chance it'll cost $350
70% chance it'll cost $400
5% chance it'll cost >$400
I also wouldn't be surprised if there were 2 models, a core one for $350 that has a small harddrive, and maybe less cables or something, and then the regular one with like a 250gb+ HDD for $400