The bottom line is you are screwing your EYES. Use netbook keyboard if you like it so much but don't punish your eyes by using that photo frame like screen for java programming.
I have only one semi-functioning eye and code in 14pt font on a 24in monitor, though, so I'm maybe not the best to talk about eye strain on a netbook... after all, one must be able to at least see them first.
But it seems like line length would be a real issue.