Create a 13.3" Ultraportable (Perfect) Latitude Notebook
Latitude notebooks are arguably the best you make, packing a lot of processing power while being a discrete business machine that is rugged and has a tough chasis that can withstand lots of travel.
However, your current D420 (D430 soon?) and D630 offerings are either too small or too big in terms of screen size. A high resolution 13.3" is the ideal screen size for the mobile power user. A 1440 x 900 resolution on the 13.3" with LED backlighting would be PERFECT. It would be more efficient than the 14.1" counterpart, but have more desktop real-estate for actually doing great work on the go (office work, photo editing, programming, browsing, watching videos, etc.)
The other specs for this KILLER ultraportable should be near identical to the D630 (not the D420) with a 1.3 mpixel cam thrown into the top of the screen. Naturally, 802.11n, SSD (32 GB, 64 GB) or HHDD (80 GB, 100 GB), are musts, and the battery life must be as good as the D630 as well. No preloaded software + Vista OR Ubuntu would be nice additions.
I'd assume such a notebook, fully loaded would weigh in at around 3.8 lbs with 6 hours of battery life and has the potential to be the #1 seller amongst mobile business professionals who don't want to carry around the bigger 4.5 lbs D630.
The m1330 has potential, but lacks the rugged business oriented chassis. But with the technology already in place, it shouldn't be hard to actually build the above notebook.
This is my DREAM notebook, and the first manufacturer that comes as close to it as possible gets 3 automatic sales from me. I hope it's Dell.
Please see Vida_K's comment below