My ibook HD is toast I think, it started making a really loud grinding noise (just like the HD is working really hard, but it shouldnt be) and the machine slowed down to a crawl. I had to hard restart it, and now it wont book past the apple logo, and the grinding noise continues. I was looking for places online that would replace my HD for me (I didnt buy applecare) and ran across a few. Powerbook resq Macservice.com powerbookmedic.com Any others? And wondered if anyone had any experience with these companies 24 hour repairs. I am not sure who to trust.