I just bought the SU9400/SSD version ($800 from Newegg) and I'm really happy with it. Vista blows (will get W7 when it comes out, already have the RC on 2 other PCs), but the laptop itself is great.
1) exceptionally long battery life. Haven't run it down yet, but a minimum of 6h and up. The battery meter seems somewhat variable so I don't place a huge amount of stead in what it tells me, particularly when the battery is fully charged (goes from 11h to 9h in about 30min!). Does mean that I can leave the AC adapter at work and not worry about it running out in the evening.
2) very light and slim, whole lot easier to lug around that my Dell D610
3) unobtrusive fan noise - I can just about hear it spin up under load on battery power (it does seem to be on all the time on AC), but it's very smooth and unobtrusive. I can't hear it over all the noise in the lab and I can only hear it at home (quite suburb, no traffic or extraneous noise) if I really make a point of it.
4) cool. Even under double Prime95 it didn't seem to get noticeably warm even after a couple of hours on my lap. Multiple intakes help alot, as it usually sits on a cushion on my lap.
5) fast, even with Vista. Power on is noticeably quick (not as quick as W7 on my desktop, but not far behind) and program opening is awesomely fast. THere are times when it doesn't seem any faster than another other HDD equipped laptop (installing programs for example), but that's not a major issue. Certainly seems to have enough grunt for my modest needs (no HD streaming yet
6) some handy multitouch gestures, though they don't always register. Scroll up/down always works well, but page forward/back sometimes gets confused with zoom in/out. Left click tap is very effective, sometimes too sensitive (have to fiddle with the setup).
1) Not too impressed with the mouse button(s) - they're fairly stiff and sit flush with the case, even in the recess at the front, which makes them hard to use with my thumbs and quite easy to release. Makes copying and pasting a 2 handed job, though I use a bluetooth mouse at work anyway.
2) flat shiny keys take some getting used to, though the travel and feedback are fine for me - don't have the loose feeling that the keys on my old D610 have. It is quite easy to slide off and hit an neighbouring key though, until you get used to it. Makes me a better touch typist I guess! Not a deal breaker though.
3) not entirely enamoured of the letterbox screen - I'd rather have a bit more height. General LCD quality seems fine to me, I'm not an expert by any means but there's nothing obvious to complain about. Side to side angles seem pretty good, though somewhat plagued by the glossy screen (not an issue from straight ahead), up and down angles show a degree of text detail lost and slight colour fade, but no evidence of colour inversion (or sepia tint, like Macbooks). Webcam and microphone are functional, if not particularly noteworthy.
4) anaemic speakers - even at full volume I had a bit of trouble hearing my dad over Skype against the lab background noise (bloody -20C freezer about 8ft away). Definitely not a party sound system laptop and not a patch on the ones in my Dell. Still, they have decent enough reproduction, even if they do sound a bit hollow.
Think that's about it. Waiting for W7 to come out to test my work programs with, then I'll wipe, reformat and install so I can regain that lost 25% of my SSD!
Still can't get over what a deal this laptop was - just the CPU and SSD are worth ~60% of the purchase price if bought separately. Couldn't even get close to it from other manufacturers. Time will tell if it's reliable and durable. Fingers crossed! If anyone has anything they want to know about, I'll do my best to answer