Still v.firmly on the agenda - lots of stuff happening behind the scenes to make such developments easier to achieve. We will, of course, let you know when anything exciting is imminent!
With today's smart phones all providing a half-decent internet experience, I've become less convinced of the efficacy of a separate 'mobile' site, personally. Depends to some extent how webby your phone is...
But it's something that we'll be looking at, certainly.