This summer I rode the FJR on a 2 1/2 week, 6,000 mile trip. I carried my 8-pound Dell laptop with the 15" screen in the Givi 52L. topcase. But it took up a significant portion of the topcase--space I could have used to carry other stuff.
Since then, primarily for traveling on the bike and by air, I bought a MUCH smaller computer, an
OQO Model 2.
It has a 5" screen, and the overall size is 5.6" x 3.3" x 1.0". It weighs 1.0 pound. It will fit in a pocket, such as a Levi's rear pocket, a jacket, or cargo pants pocket.
This is a full-featured computer that comes with Windows XP or Windows Vista operating systems. You can type on the keyboard with your thumbs and use the pointing stick as a mouse, but for extended use I have a portable, folding bluetooth keyboard and bluetooth mouse. The 5" screen is very readable. Some people use it at home as their main computer and hook up a large monitor and standard keyboard. Then when they leave the house, they throw the computer with all of their programs and files into their pocket.
You can order it with a hard drive as large as 120 GB, or a 32 GB solid state drive (SSD). It comes with bluetooth and standard wireless 802.11 a/b/g. Optional, is EV-DO mobile broadband (Sprint or Verizon) so you can connect with the internet anywhere you have cell phone coverage.
And, I have no affiliation with OQO.
I travel a lot, both on the bike and other modes of transportation, and this is a lot easier to carry around than that damn 8 pound, 15" laptop. A computer with a 5" screen may not be for everyone, but if you are going to be hauling the notebook computer around much, I would not get a screen any larger than 12".