rails-file-uploading

This tutorial was written by a Windows user. Assuming you are working
on a linux / mac osx / unix system you need to change all occurances
of "\" to "/" in path specifications.

"app\views\upload\uploadfile.rhtml"

becomes

"app/views/upload/uploadfile.rhtml"

Also, based on the "rhtml" extension I'ld say this tutorial is
somewhat dated. Current practice would be:

"uploadfile.html.erb"

If you don't already know it, this is a good place to start:

http://guides.rubyonrails.org/

enjoy

this looks sweet for inline file uploading

http://coderack.org/users/freels/entries/24-inlineuploader