I've had it with XP on my Sony VAIO UX180 UMPC. The last straw was the Sony recovery CD (sold separately) BSD'ing on me (to be fair, it was a drive error and it probably found the Ext3 partitions from my previous Linux and didn't know what to do with them).

I'm now running MoonOS (Ubuntu with the Enlightenment desktop). My first usability hurdle is the built in J Stick pointing device. Down pressure on the stick is interpreted as mouse button 1 (thankfully, there are two dedicated mouse buttons and a scroll button). The J Stick button is useless (you can't click anything without the mouse skittering away) and unless I am very careful, anything the cursor passes over gets clicked or selected.

Mouse Settings and Mouse Bindings don't show the J Stick button 1 separately from the dedicated mouse 1. Sony had a Windows app that let me customize inputs, including disabling the mouse 1 function on the J pointer.

I've not found a lot in general about Linux on the UX series. I know this is not a trivial question, but where would I start looking to disable mouse clicks on the pointer? I'm guessing there is a way to track inputs in a terminal window and modify a config file to ignore that input.