Well, maybe -- reference 15 seems to imply that HIV can be found in the respiratory tract, even though it is not especially (at all?) transmittable through the air. The paper seems to raise the possibility, though, so even if airborne transmission isn't a risk, this will hopefully at least light a fire under the research.
They look at patterns of transmission, I think. For example, HIV is present in saliva, semen and vaginal fluids but it's not transmissible through contact with these fluids or droplets unless there is some type of blood contact (open sore in mouth during oral sex, for example.) If you could get HIV through kissing it would be much more prevalent like EBV which has a prevalence as high as 95%. Respiratory viruses that are spread through coughing or sneezing like measles would have a much higher infection rate than 1-4% estimated for XMRV. Here's
an interesting case study of a single case of measles spreading through a community. 32/50 unvaccinated people contracted it within six weeks of initial exposure (there were 2 vaccine failures) -- that's a transmission rate of 64%.
So, right off the bat I suspect that they will rule out transmission from saliva and sputum.
ETA: oops, leaves made my point while I was still typing.