Yup, my hands are getting creaky but thank goodness they still perform well. After gigging on acoustic for 7+ years, I've restrung with lights and tune down to C. The guitar sounds huge and the string tension is low enough that it sounds like a funky strat with acoustic tone. My left index finger is the sore one but if I adjust my hand position so it's more of a right angle to the neck, it feels much better on the C and F chords. I also play a Strat in various bands - low action and light guage works wonders.

I'm also taking Glucosamine, as it's helped with hip soreness. I sure hope modern medicine can come up with the arthritis killer!