About your back, I lay in bed working for a few hours a day as I have a back problem too, but not as bad as yours (I joke to my wife that I am turning into SEO Dave, she says ‘oh please’).

The physiotherapy exercises my doctor gave me are hard. I do not do them, but I found a Polish physiotherapist that taught be totally different exercises that even my “Havard Doctor” in Boston did not know. I do these exercises and mostly the pool and feel much better.

Your adsense templates are still working for me. I use them on most of my sites. I recommend them now to people even who have no intention of using adsense because, they are so well SEOed that even if you went to a large firm they would not do better. You can turn off adsense and use them as your site or blog.

My income lags behind yours, but I am an American in Poland and its cheap here so relatively I am pretty good. Also, I do other things of course like write language software etc. My real thing is languages.
PS if I see something important for SEO I will Tweet you. Let me know if you do not want these Tweets or comments. I can see, I might get dragged into the Tweeter mania despite my skepticism about its long term time/efficiency for making money.