I have a friend who broke his femur skiing last winter. Spiral fracture of the lower femur, repaired with a rod inside the bone (took 2 surgeries to get it done right) and hip/femoral neck fracture. He's been plagued with a number of screws loosening/backing out. Had the ones in his knee removed, but the doc refuses to removed the screws in his hip until at least a year post-op. He's got the same sort of tendons snapping over bolt head thing. He's been riding a bike on a trainer, says that's better than walking because the hip angle keeps the tendons off the bolt heads.
I've seen Triskeliongirl's crankset. It's custom made. Even the pedal is custom in order to rotate properly with the crank arm. I'm sure she'll give you the details if you ask.
Oil is good, grease is better.
2007 Peter Mooney w/S&S couplers/Terry Butterfly
1993 Bridgestone MB-3/Avocet O2 Air 40W
1980 Columbus Frame with 1970 Campy parts
1954 Raleigh 3-speed/Brooks B72