I have travelled for many years with a Macbook. Cycled across Himalayas and Andes. On good roads and on bad. These Macbooks are the best. Now I travel very lightweight (only small backpack) on a single speed bicycle from Singapore to Shanghai with a Macbook Air. This is the ultimate laptop for bicycle travellers.
http://osmosno.wordpress.com/2010/01/31/packing-list/