Planning the itinerary

It is very challenging to purchase tickets that include airports AND dates for 10 months from now. We haven't actually purchased tickets yet....but this is what our itinerary will probably look like:

nyc to toyko to shanghai to hongkong to bangkok to calcutta to bombay to delhi to addis ababa to accra to cairo....and railing from there up through turkey and europe to dublin and home.

Do you have recommendations or ideas or contacts or suggestions? Now is a great time to pass them our way. We are seeking volunteer and service service opportunities, as well as a chance to meet up with friends and family abroad. And we would happily welcome any "fun" or "honeymoon" related suggestions as well! :)