That's awesome - now that I'm getting older, flexibility is an issue for me - have you heard of the GymnasticBodies program? And how have you found yoga - it's something that I've been thinking about but haven't bit the bullet yet?
Haven't heard of the Gymnastics Body program. What's that all about? Reminds me of a book I saw ages ago about body-weight training called Defying Gravity.
Can definitely recommend some yoga. It's easy to customize it to be as difficult or easy as you need it to be each day -- and if you start to really get into it, you can couple it with some calisthenics movements and build some serious functional strength.