I was out looking for UML Shapes for Microsoft Visio today. I knew I had found them before, but I couldn't find them for the life of me. Chris Brooks reminded me of Pavel Hruby's most excellent Visio Stencil and Template for UML 2.0 downloads.

He's got versions going all the way back to Visio 4.1, and more importantly he's got one for Visio 2003. He offers them as a free service but appreciates donations via PayPal.