I'm an Apple Authorized Business Agent and can second the above post - they can be pretty picky about the use of the apple logo.
By the same token, it's not in the interest of their corporate image to go pounding on some little business who takes care of their computers.
If you want to join the AABA program, go to agents dot apple dot com and take a look. For the $50 application fee (and providing you pass the legal parameters), you can safely use the logo. I don't know the scoop for their other programs (like resellers), but they might be worth looking into too.