I had surgery end of Oct 09, and was on a 5 (NOT 10, 5) pound weight limit for two months. Then it was bumped up to 10 for another two. I was cleared for "real" exercise mid March following surgery, but was still having bits of suture material "bubble up" in March.
Not being a fanatic about extra exercise (I've always gotten a lot in miles of walking everyday to/from and at work), I actually started a walking program after surgery. I've kept it up, but it is more of a pain than enjoyable. The post-RT fatigue has never left me, and I really have to force exercise of any sort.