We are interested in taking a Volunteer Honeymoon but don't know where to start - help!

What a great thing to do! I hope this excerpt from my book helps:

Volunteer Vacation
While definitely not for everyone, a great way to make a difference while getting to travel abroad is to take a volunteer vacation (as an added bonus, most trips are either heavily subsidized or are tax deductible). Companies like Cross Cultural Solutions do not require any previous experience and offer 1 to 12 week programs working in clinics, homes for the elderly, schools and day care centers around the globe. For slightly pricier but extremely exciting trips, look at the Earth Watch Institute expeditions page, where you can search by date and continent to find a wide range of trips, from collecting butterfly data in Vietnam to documenting folk song sand dance in Russia. Along similar lines, the fair trade site Global Exchange offers reasonably priced educational “Reality Tours” to politically complex countries like Cuba, Brazil and China and, for the brave of heart, volatile areas like Iran, Afghanistan and North Korea. Finally, Cheap Tickets offers a number of Volunteer Vacation deals which you can view by clicking here :Cheaptickets Volunteer Vacations.