VX809 just started recruiting for the Phase II study (Feb-March timeline), so no results will be published for a while... I'm guessing at least a year.
<a target=_blank class=ftalternatingbarlinklarge href="http://www.clinicaltrials.gov/ct2/show/NCT00865904?term=cystic+fibrosis&recr=Open&show_locs=Y#locn">http://www.clinicaltrials.gov/...=Open&show_locs=Y#locn</a>