Matt,
I posted a similar question about two months ago, when I was 1 month away from surgery. I'm now 3 weeks post op after a left hip resurfacing with Dr. Pritchett in Seattle. I feel great! I've been walking 1-2 miles every day since about 6 days after surgery. In my case, I have good news and bad news about pre op exercises. The bad news: For the last 5 weeks, before surgery, I hiked each day. The hikes often involved moderate to steep climbs. I thought this would help strengthen my quads, glutes, etc., before surgery. I think it worked, but the hiking also lead to unwanted wear and tear on my hip joint. My pre op X-rays showed this. In retrospect, I think I would have been better off focusing on the PT exercises, some weighted, that did not cause so much damage. If you feel any grinding or discomfort, DON'T DO IT! Exercises that focus on abductors, glutes, and balance will probably serve you the best. It's amazing how weak these have gotten in just 3 weeks. Hope this helps.
-TK