What kind of files are you looking to share?
Cause you can connect to your PC wirelessly with Goodreader, Photo-Sort and iAnnotate, that I remember. Of course, each uses different methods, so knowing which file you want to share/see/transfer will help narrow it down.
As in, I can give directions for the 3 mentioned above - but I don't want to shotgun-spread all the directions out in hopes of hitting the one you want...
Marilyn