Yep, I took the 70-630 exam today and didn't miss a single question on it. Now understand, I have taken quite a few (this was my 11th) MS certification exams, and this was the first time I ever aced one. So, I am feeling pretty good about it 
. Funny thing is though, I really think that anybody (yes anybody) who has actually been intimately involved with a real-world MOSS implementation using at least a small/medium farm topology better be able to at least pass this test with NO 
preparation. Seriously, most of the questions are common sense. In other cases the only correct option happens to be the only one that actually represents something real in SharePoint. Basically, I think folks with real-world experience with MOSS will pass, missing maybe 4 or 5 questions. If you take a little time to understand what "quiesce" means, then make that only missing 2 or 3 questions (yes, two questions deal with quiescence issues – seriously, just know that term and you get two questions right).
If you are considering taking the exam and feel like you need to take a couple of days or weeks studying up, DON'T. Unless you are a newbie to SharePoint, you will pass this thing first try. Still, if you are one of those anal types, take a look at this. Lots of good stuff on there.
Happy testing!