If you care to post an arrangement you're working on here on the forums, there are several ways you could go about doing it. The most accessible to others would be to upload a PDF file of the arrangement you're presenting to the forum for review when you post. Then, if you have the means, upload an audio file of it to http://www.putfile.com (this will require registering, but you get to host mp3s that are playable online . . . it's a great service), and put the link of this file in your post. That way people can review the file both aurally and visually.

You can post a Finale .MUS or Sibelius .SIB file, but there's no guarantee that everyone on the forum will have the means to open those files. Even those that have Finale and Sibelius may not have a compatible version.

If you don't know how to create PDFs, there's a very easy-to-use (and free) utility called CutePDF that you install and set up as a printer. Once installed, this utility allows you to select it as a printer instead of your usual printer and create a PDF out of any file that you could normally print. The website for CutePDF is http://www.cutepdf.com and it has instructions for installing and using it there.

If you have any updates to the piece as you work on it or make edits based on member feedback, you can simply reply to the thread with an updated Putfile link and fresh PDF upload. Quick, easy, and painless. If anyone has any further questions about uploading arrangements or compositions, feel free to PM me.