I’m looking at these bus (non) tours. They bring you from point A to B and they are hop-on hop-off, but are for backpackers. Magic is the one recommended on Thorn Tree for my age group (cough, 30+, cough).
Also, can’t forget WikiTravel. Would like to carry as few books as possible, so this might be a good way to take notes in my own book – thereby making a travel book of my own 🙂