I work on a bone marrow transplant unit and the principle is sound, but the method they used wouldn't be a wide spread treatment. First of all finding allogenic donors isn't easy in itself, but finding allogenic donors that are both compatible and carry HIV resistance would be extremely difficult. (ie not many people would be matched) Plus, BMTs have alot of risk involved - the high dose chemo used to destroy the host marrow leaves the patient at high risk of death by treatment and/or organ damage as well as high risk for secondary cancers. Also even if the graft holds you can have complications like GVHD (graft versus host disease) or possibility of relapse of host tissue (thus providing fodder for HIV).
So it'll never be a "good" solution (unless someone comes up with a gentler way to destroy someone's marrow). But the case does offer the possibility for a "cure" for HIV (with risks). The next path I see is to better understand the genetics of HIV resistance. I'm not completely up to date, but the last time I read research on the topic is that the prevailing theory is that HIV resistance is linked to a altered membrane protein on T cells that prevents HIV from latching onto the cell. Now if the genetics is well understood you could harvest marrow from a patient, grow the cells in a dish, and do gene therapy to replace the wildtype membrane protein with the resistant strain. Then destroy the marrow in the patient and give him/her a gene augmented/altered autologous transplant. This doesn't get rid of the risks from the high dose chemo, but will reduce the risk of GVHD, minimize the need for immunosuppression, and get rid of the problem of finding matched HIV resistant donors.
But again, BMTs are very risky and given the effectiveness of most protease inhibitor cocktails I don't see it as a routine treatment. But alot of HIV positive people do get secondary lymphomas and leukemias because of their HIV, and I do see this as an exciting avenue for simultaneously treating their cancers as well as their HIV. Plus, while still very risky, BMT continues to make strides as they fine tune the drug regimens. It's legions better than in the 70s when everyone was dying from the chemo (VOD, tumor lysis, etc.) or being devoured to death by GVHD.
AIN'T MEDICINE COOL?