I meant to recommend this last year: Architecture for Humanity's competitition to design mobile AIDS clinics.

"The statistics are staggering. It is estimated that three-quarters of the world’s AIDS population lives in Sub-Saharan Africa; most have no access to lifesaving drugs, testing facilities or even basic preventative health care.One of the major factors inhibiting medical professionals in Africa from treating this disease is the inability to access vast areas of the continent with adequately equipped medical facilities. To meet this need, Architecture for Humanity challenged the world’s architects and health care professionals to submit designs for a mobile HIV/AIDS health clinic. ...

"We are currently developing a prototype based on the winning entry by architects from the Danish design firm KHRAS, and a workshop is planned in KwaZulu-Natal, South Africa to refine and further develop the clinic’s design. During the workshop, which will be held at the Africa Center for Health and Population Studies at the Nelson Mandela School of Medicine in December 2003, teams of architects representing the four winning designs will collaborate with relief organization representatives, local doctors, engineers and transportation experts to develop construction plans for a working prototype based on KHRAS’s winning entry"