OK, branching off another thread. There probably aren't many, but there are
a few clones that I'd consider "interesting." I'd say the PCjr counts,
it
was a pretty strange system - the unsuccessful IIgs of the PC world. Sidecar
expansion slots, IR keyboard and cartridges...
The last of the PS/2's had some strange designs. The 95 was really strange -
a fold-out power supply design with a spring loaded plunger power supply
connector. C2 level hardware, which meant if you forgot the BIOS password
you're SOL. I'd count the whole MCA based PS/2 line as a string of oddities
in the PC world.
There were some really odd Japanese designs as well. My favorite is the FM
Townes, which was a hybrid PC and game console. It ran a proprietary OS, but
could run language-localized Windows. It also had an oddball graphics system
that could overlay multiple screen modes over each other, so you could play
full-motion video games with text overlay.