You might regard the Sharp Willcom D4 UMPC (pictured above) as either a competitor to Nokia's N810 Internet Tablet — or maybe as its next-generation successor.

The D4's 5-inch screen has 1024x600 resolution: better than the NIT's 800x480. It comes with 1GB of RAM and a 40GB drive. WiFi and Bluetooth, of course, slide-down keyboard and camera. (No GPS) Befitting a next-generation device, the D4 is the first web tablet utilizing the Atom CPU, Intel's low-power chip for mobiles (maybe I should say "speedy chip" it runs at 1.33GHz).

Yup, the D4 has everything going for it. "Beating Nokia at its own game even," you might say. Except the design parameters for a weblet include more than "screen shows a full web page width." Light weight -- the D4 is twice as heavy as an N810. Fits in a pocket -- the D4 is 1 inch wide and 7.4 inches long; but maybe Sharp's customers have bigger pockets than I do.

Well, sure, they'll need to. At $1525, the D4 obviously requires deep pockets.

Me, I'll be buying weblets in $500 installments -- is a D4 worth more than three N810s?

Not to me, anyway, with my small-in-every-way pockets.