ShareMiner is another great free file host searching tool. It does a great job at indexing many of the websites and forums that might contain Rapidshare file sharing links, and gives you an easy way to navigate through them.
Here is a little more about the service from the developers:
One fine evening, while talking to some of our friends, we discussed on an idea of having a search engine for files only. We thought this would be pretty cool since this way we could find files stored on various places on web, including file sharing websites.
We brain stormed more and more about making this search engine really useful, so that you get to the desired file result in a jiffy.
We started working around this idea and came up with ShareMiner Search, we have tried to make search results most relevant to your need. Using ShareMiner.com you can search Rapidshare, Megaupload and many other uploading sites and file hosting services.
Overall, it does a great job at helping you search the free file hosting services for what you are looking for. You can try it out for yourself at ShareMiner.com.