The availability of effective therapies for ME/CFS, FMS, and Gulf War Syndrome is still quite a ways off. Pharmaceutical companies have expressed a great interest in screening currently available HIV therapies, and compounds that did not pan out for treating HIV. Likely it will be four years before the FDA approves any existing drug for treating XAND disorders - By next summer a number of drug candidates that work against XMRV will be selected for Phase II clinical trials (A Phase I trial is not necessary for a new indication), followed by a larger scale Phase III trial, which will likely not be completed well into 2012, with approval in 2013! For new chemical entities, it will be even longer - at least that long for protease inhibitors (purifying the protein, doing X-ray crystallography studies, and finding small-molecule inhibitor candidates), then starting from scratch with phase I studies - what is going to turn out to be about a 10 year process, and likely the FDA won't grant accelerated review.
It's not to say that when results from ongoing studies begin to surface, that doctors won't begin the label of practicing current HIV drugs off-label to XAND patients. However, such patients will have to shoulder the cost of treatment themselves, as insurers will be very reluctant to cover a drug which is not indicated for a particular disorder by the FDA. High drug costs in the United States, which has been decried as criminal by AIDS activitists, will present a formidable barrier to most people. In some countries with publicly funded health care systems, these drugs will be even harder to obtain: HIV patients have programs where drugs are given free of charge at clinics, and are not available in community pharmacies. In some jurisdictions like British Columbia, which has a publicly funded drug plan, despite being approved for use by the federal government, the drug plan will do time-consuming studies which last on the order of 2 or more years, further delaying availability of treatment - so much for universal health care!