[5-]

why not zipit z2 (if you can find it)? i remember the keyboard not being great but it was completely usable.

around the same time there was also ben nanonote, but the z2 is probably preferable to it.

not a lot of clamshells since then (and generally not enough pocket qwerty computers).

for something slightly larger, consider gemini pda or one of its succcessors, or a keyboard case for a phone, e.g. pinephone.

or a bit larger still (but the same 6" screen diagonal), you get an actual pc with gpd micropc.