Barry / Spencer,
I am also a triathloner, although not nearly as experienced as you both, I,ve been doing them for 3 years with thel ast one being Iron Man Lake Placid 2007.
I had my right hip resurfaced on June 23rd, so I am 4 weeks along. I have been on a stationary bike for about 15 min last week and everything felt good. I can definitely tell that everything is getting stronger to the point where I sometimes forget that I had surgery. I want to try my trainer but haven't had the chance yet. I think the only challenge would be mounting / dismounting. I also want to get in the pool maybe this week to see how I do.
It sounds like you both are doing great and are already out-pacing me, but I will let you know of any significant rehab break-throughs.
-Brian