I was looking for examples of persona templates, and I came across Personas: Moving Beyond Role-Based Requirements Engineering by Randy Miller and Laurie Williams.  I found it to be insightful and practical.  I also like the fact they included a snapshot of a persona template example from MSF Agile ...

MSF Agile Persona Template

• Name - Enter a respectful, fictitious name for the persona.
• Status and Trust Level - Favored or disfavored and level of credentials.
• Role - Place the user group in which the persona belongs.
• Demographics - Age and personal details optional Goals, motives and concerns.
• Knowledge, skills and abilities - Group real but generalized information about the capabilities of the persona.
• Goals, motives, and concerns - Describe the real needs of the users in the user group represented by the persona. If multiple groupings exist, write a persona for each grouping.
• Usage Patterns - Write the frequency and usage patterns of the system by the persona. Develop a detailed understanding of what functions would be most used. Look for any challenges that the system must help the persona overcome. Note the learning and interaction style if the system is new. Does the persona explore the system to find new functionality or need guidance? Keep this area brief but accurate.