A recent GAO assessment of the DoD's response to ill GW vets yielded a complimentary review. The health studies both found no evidence of an overriding syndrome. A CDC conference bringing together various clinicians and ailing vets at the beginning of March yielded almost no coverage. It's conclusion - more research is needed. However, the most recent hearings on Gulf War illnesses not only expressed that hardly anyone could have been affected by the demolition at Khamisiya, but that the illnesses in general have been researched as thoroughly as possible.
Research continues in dribs and drabs, but is making much less news than in the past.
There is no more research left to be done. The issue will be harped upon until someone can invent a similar claim for some other conflict, but no real attention will be garnered from now on.