I am gonna make my own flash file-uploader, but I can't find any good materials. It would be nice if somebody will give me a link to manual regarding how to make a simple flash uploader, but I'll appreciate any responses and suggestions. Thank you.
What technologies are you using other than Flash? I'm going to assume PHP.
A good place to start would be to check out the AS3 FileReference documentation.
Here is a decent tutorial that may be helpful to get started.
And this site is usually pretty detailed. (Sorry, couldn't help myself :)