Unknown User on our forums, the news about an interim build being released to testers yesterday was incorrect. After speaking with an un-named Vista Project Manager he made the comment on the forums here and we can now confirm a day later than the expected release date that Neowin, Paul Thurrott and a few other sites made a boo-boo. Paul Thurrott being the exception because he commented that the build might be out 'sometime this week' as well as saying that the expected date was monday.
Thats not to say that there won't be a release sometime this week, but we for obvious reasons can't confirm anything. Paul has not edited his website and appears to stand by his claim that testers will get an interim build (likely 5365) sometime this week.
Time will tell, but for now we'll keep our ears and eyes open for an update on this.