Jeanie, glad you are liking your knee replacement. Several of my students and friends at the gym have had knees and hips replaced, and have been very happy.
Givio, hubby just signed up for Medicare. He has VA coverage as a disabled vet, but got part B so he could go to better doctors outside the VA system. (Not that all the VA drs are bad, he's had some great ones...) That is still two birthdays away, for me, but I'm lucky that I know a Humana rep whom I trust, who can help me navigate through it when the time comes. I know if you don't enroll on time than your are penalized and pay more per month, for the rest of your life... which doesn't seem right. Read those books, if you can stand it!