vBulletin Private-Message Viewer - Copyright, Logo Art Legal Issues
 

I don't know where this most properly belongs, so I'm posting it here.

Ali Keshavarz has written a vBulletin PM Reader for reading and searching saved private-message files without doing any interaction with vBulletin software. Since it only works in Windows, I'm writing one for MacOS X.

I intend for it to be open-source, but I'm concerned about some possible legal problems.

What would be the best way to refer to vBulletin's copyrights? "Copyright (C) 2000-2009 by Jelsoft Enterprises"? Would it be a good idea to have a disclaimer that I have no official connection with Jelsoft and that this software has no official endorsement by Jelsoft?

As to logo art and icon art, I'm thinking of staying clear of vBulletin's official logo, because using it seems like a copyright violation and implied endorsement, and because it is not as familiar as vBulletin's name. However, I'm thinking of using the letters "vB" in some connection, like a page with big "vB" in it or a magnifying glass atop those letters. I hope that that will not be a big copyright problem.

Or should I call off this project because of copyright concerns?