There are several physicians in the US and abroad that work with HIFU . Clinical trials are under way in the US as we speak and its been used in other countries successfully. The US is a bit slow.

My husband had it done some 8 months ago. Totally pain free and zero side-effects. It's truly the future of curing prostate cancer. It's a shame that America is so slow, they've been curing men in Europe for 18 years using HIFU (High Intensity Focused Ultrasound). Ted Koppell had a guy on NightLine a year ago who had it done. Japan shows a 100% cure rate on a study. We have clinical studies in the works, but that takes years, I find it funny that radiation did NOT have to undergo (waste time) on clinical studies, and we've always known that radiation causes many side-effects. There's vested interests there...But anyway, I think the most important thing is chosing the best, most experienced doctor, we had the guy who has done over 500 HIFU treatments, he actually told me that he feels badly about his first dozen procedures, as he said, "there's a learning curve". The trip to Mexico was great too! A really nice pristene hospital, and my doctor brings his own anethiesologist and nurse and a certified mechanic to monitor the machine. It's a top notch treatment!

By the way, total hospital time is about 5 hours, but procedure time was 2.5 hours. Then you have to wait until the anesthesia wears off, that takes another couple hours. They only put you to sleep to make sure there is no movement. And...doctor doesn't want you asking questions and bothering him while he is concentrating! He actually sees the cancer through the ultrasound on a computer screen, real time 3-D image, if cancer is outside the gland then he can zap that as well. He treats the entire gland though, so no chance of recurrance.
Of course there's always a chance of recurrance, no matter what path of treatment you take, 35% for surgery, 25% radiation, and 6% HIFU are the published rates I've found.