Well my initial thoughts on the build quality is very positive. It's better, overall, than my previous T61 and the Dells I've owned aren't even comparable.
Honestly, I think the people complaining about the flex in the keyboard are complaining for the sake of complaining. Yes there is flex IF you absolutely SMASH down a key with an insane amount of force! Under normal typing conditions, even if you're a heavy-handed typer, there is absolutely NO flex. The keyboard feels solid, feels GOOD, and is very quiet. No flex around the trackpoint, either. It's definitely better than the T61 keyboard, as the T61 keyboard had a more "clicky" sound.
When closing the lid, the laptop feels completely solid. First of all, the latch gives a nice click to let you know it's fully closed. Sure, it's not a snazzy magnetic latch, but believe me when I say that it's a snug fit. If it's closed, I can shake the machine as hard as I can and nothing is rattling, even while it's running.
Some people have been complaining about loose screen hinges. Well, I'm experiencing absolutely no screen wobble, so what does it matter? The screen has never moved from where I put it, ever. It only moves if I intentionally shake the laptop with high force, something that never happens under normal use.
I'm pretty rough on my laptops since I'm always on the move. I'm really glad that I don't have to baby this thing. So far the first impression is VERY good, however there are a couple things I don't like, so don't get the impression that I'm worshiping this laptop! I'll cover them when I write the review.
Overall, I'd say the X200 is a magnificent machine, but it's not for everyone. Give me about a week so that I've had some quality time with this thing and I'll write up a report in high detail. If there is anything you'd like to see, post here and let me know. I'll do my best to get very specific pictures and what not.