My best thought is to continue to show encouragement and appreciation (and maybe bad jokes). I think Mr. Brown aka the Sheldon godlike bicycle guru, knows he is appreciated, but it is always nice to hear.
On a maybe practical side, is anyone a medical professional who knows of a neurologist who might be able to look at the blog and throw some ideas out? Not to disrespect any of Sheldon's doctors, but yet another set of eyes might see something from a different angle.