No offense, but I'd classify that more as fussy than picky. I'd say I'm pickier because I eliminate some choices on weight alone, while you've currently got a model weighing almost 8lbs. That might be the lightest of a selection of behemoths, but I'd never pick something that big at all.
Sigh, our posts crossed again so you didn't see the paragraph that I added to my previous post. I am both fussy and picky. These days, the only things I find light enough to carry around on a regular basis are my Palm Centro (which gets unlimited access to the internet), Dell Axim X51v, and HP Jornada 720. All of these fit in a pants pocket, which is great because I hate to carry bags. When I am required to carry a laptop, I use my HP nc2400 with the optical drive taken out to reduce the weight to 2.81 lbs, but that happens only several times a year. All the other laptops listed in my signature are desktop replacement units that never leave my desk.
In case you're interested, here's the history of my search for the lightest laptop that I could afford:
Thinkpad 600E (5.29 lb)
Dell Inspiron 700m (4.14 lb)
Thinkpad 240 (2.96 lb)
Thinkpad X40 (2.76 lb)
Toshiba Portege R100 (2.38 lb)
Then, sometime in 2006, I started getting picky about display resolution as well and decided I could no longer tolerate 1024x768. That's why the lightest laptop that I currently own, the HP nc2400 is actually heavier than the 2.38-lb Portege R100. This HP is the only sub-3lb (without the optical drive) laptop with resolution higher than 1024x768 that I can afford.
But again, even this HP is too heavy, so most of the time, I just carry my Palm Centro.
As for the 4lb limit, what do Lenovo and Cnet consider a subnotebook, if 4lbs is ultraportable, if you happen to know?
I could be wrong but I don't think IBM/Lenovo or Cnet distinguish between "subnotebook" and "ultraportable". I personally define "subnotebook" based on size rather than weight. For me, "ultraportable" is anything between 2 and 4 lbs, whereas "subnotebook" is any laptop that's 10.4" for 4:3 or 11.1" widescreen, or smaller. So, the Thinkpad 240, which weighs ~2.95, is both a subnotebook and an ultraportable.