Filestube is a newly launched search engine service. When you search for a keyword on Filestube, it doesn't search the entire web but only various file upload sites. The search results will naturally be some files, such as rar, zip, mp3, avi, wmv, etc. Personally, I think this search engine is quite useful for those who often look for resources on various file upload sites. It at least saves the trouble of going around everywhere; you can search for resources on all major file upload sites directly through this one search engine. However, since it has just been launched, according to my tests, most of the current search results seem to come from the most famous Rapidshare. Perhaps there will be more results in the near future.
PS: You can also submit your Rapidshare account to Filestube so that more people can share your files.