I've got a Compaq sub-notebook that runs DOS/3.11, and some of those slab-tops you're aware of, but I do not have any of the old HP tiny pocket computer things. @PS2it might though.
I’ve got a Compaq Contura similar to Performa’s, but that’s all. At some point I’d like to get hands on a HP or a Gateway Handbook, or even a Toshiba Libretto. Even though the latter two are a little bigger than the HP, they’re certainly still tiny!