BPMN stencils for Visio
Visio does not natively support BPEL or BPMN, which are both commonly used in business process management applications. BPMN stands for "Business Process Modeling Notation" and is a proposed standardization for graphical notation for enterprise processes. The BPMN working community has come up with their own Visio stencils to use to create diagrams with BPMN 1.0 shapes: http://www.workflow-research.de/downloads/bpmn/
I haven't heard of anyone else in the BPEL community who has done a Visio template. If you have, feel free to post a comment.