I just played with the MacBooks at Westfarms for about an hour. I already have a white 1.83ghz on order, so this wasn't about dealbreaking so much, but I was very wary of the glossy screen and keyboard so I wanted to see them in person.
Photos seem to overstate the gloss of the screen, in my opinion. The first thing you notice is not the gloss, but rather that the screen is significantly brighter and more clear than the iBook G4 (I have previously owned 2) or the PowerBook G4. I was surprised by its quality and while there is some glare, it's worth noting that the Apple Store practically has a glowing ceiling, unlike most homes, so if that's what your workspace is like, you may take concern, but otherwise it should be fine. I am curious how it performs outdoors, but let's be honest, the iBook's matte screen was pretty much illegible outdoors too on account of being so dreadfully dark.
The keyboard takes some getting used to but all in all I liked it. The keys' action is more responsive than the iBook and there is none of the squishiness that made me always worry my typing would break the iBook. If I watched my hands I became confused by the spaces between the keys, but if I was typing normally, ie. not staring at the keyboard, it worked fine. My memory of my 12" PowerBook G4 makes me think this new keyboard is not quite its equal, but I was just fiddling with a friend's 15" G4 and the MacBook's keyboard is certainly superior to that one - the G4 keys have nice action but feel flimsy.
The magnetic latch is awesome, and reminds me of one of my favorite features of my tangerine clamshell. Build quality in general seems much better than the iBook G4, which was, in my view, a real drop from the original Dual USB iBook G3 - whose first incarnation was one of the finest machines I've ever used, all logic board problems aside.
The weight of the MacBook is quite good given its size, and so it's the size that is slightly disappointing, as it is much more on the scale of the 14" iBook than the 12". However, I have no qualms about the dimensions that have grown, and am more excited by how slim it is - the other things that occupy my bag are books, usually, so the thinner the laptop is, the more space for other things; whereas depth and width are not occupying space I could have ever used for other storage anyway.
Sadly the display models have no games installed so I couldn't try out the GMA950. As soon as my order arrives I will give it a thorough test in World of Warcraft, with comparison to my 1.83ghz iMac and my old 1.33ghz iBook G4. The Radeon 9550 is nothing to write home about in WoW so I am curious how the MacBook will compare.
Incidentally, after seeing them in person, the black MacBook is really sharp. The cosmetic problem with the white ones is that the keys match the outside of the laptop and not the slightly grey interior material. On the black models, the keys are the same color as everything else. I have to say the design on the white MacBook is somewhat distracting. But I wouldn't plunk that kind of money just for the color, sorry.