https://github.com/ploopyco/bean-pointing-stick/
NOTE: Despite the lack of wires in any of the photos, this is a wired device.
Sick design though!
I think the nub is in the wrong place. When i was a kid i had this ( https://webassets.lqdt1.com/assets/photos/16167/16167_2131_1... ) mouse from ibm (at the time maker of thinkpads) and that’s a more sensible choice in my opinion.
I'm the happy owner of a Ploopy Adept[0], which is a similar concept to the Bean, but which uses a trackball instead.