Ken, yes I had a new left hip about 3 months ago, I was walking in days! and riding in 6 weeks. What type has your surgeon suggested? I had a 'Birmingham', for anyone that rides I suggest this type.
Old school hip replacements use to replace the femural head (the top neck of the femur) with a spike about 6" down the inside of femur, for riding this causes a point at the end of the spike where the leg could break in a crash; causing all sorts of medical issues.
The Birmingham just replaces the coating of the ball at the top of the femur, with options in material, I had 'steel on steel' for toughness but options are ceramic (low friction but brittle) and plastic (easily replaced but wears quickly).
Having my hip replaced is one of the best ops I've ever had (and I've had 35), no pain, the only draw-back is slightly less range of movement.
I had mine done by a guy called 'Jim Kiellerup' at Latrobe Medical in Bundoora; he has done my last 6 operations (knees & shoulders), he is fantastic (and no out-of-pocket!)
Feel free to call me if you want to talk about it.