Living with a disability sucks. Any project that increases awareness of how a disability can inhibit an otherwise coherent individual from doing everyday tasks (like buttoning a shirt), is worthwhile in my (not so uninvolved) opinion.
As for Rush mocking Michael J. Fox, Here's his response on NBC: http://www.youtube.com/watch?v... As Michael states in the video, without medication he'd be frozen (Google 'Parkinson's Frozen' to see what he means by that... it's pretty freaking scary). While I lean more towards Republican viewpoints than Democrat, I find Rush's insinuations in this instance distasteful, ignorant, and hurtful.
Robin Williams committed suicide during early stages of Parkinson's, possibly due to the idea of living with this disability for the rest of his life. Not having an entire foundation at my disposal, when I get to his stage of Parkinson's, I obviously cannot expect to have as finely tuned medication dosing as Michael has.
My goal is to live my life as well as I can, as long as I can. That's all any of us can do.