i went with an organisation called VSN who are part of a wider organisation called GVN. This is a very worthwhile organisation where you can really get involved, it is well run, and the programme fee, which is lower than any other i have seen elsewhere, is put to good use, every penny of it!
www.volunteerhq.org/ American volunteers wanted for affordable volunteer trips abroad!
www.crossculturalsolutions.org/Asia 1-12 Weeks in Thailand or India. Help People and Change Your World!
www.rcdpinternationalvolunteer.org/ RCDP Nepal Most Reputed Program $50/ Week, 12000 Volunteers, 10 Yrs
www.globalcrossroad.com/ Affordable, Life Changing Programs. Direct Pay to Host Family. Join Now