I still shoot film, so I like grain myself
This tool is ok, maybe a bit crude..it's actually not that easy to get the film look for print, some software such as exposure 2 is fairly good at this though..Of course grain is only one aspect of film, you cannot really turn a digital into a film capture, they are uniquely different, esp in the tonality and DR dept. Still, not sure this is worth putting it, I'd like that distortion controls to make it over this grain control one!
Have to say this, wandering a bit, I hope the Adobe folks are looking at Apple's new offering, and give LR3 the boost it needs.