Pantone is now shipping a color manager application and I've read where it is easier working with libraries using it. You have to register a Pantone product to get it. Ka Ching.
Further to John's reply, users who have questions about PANTONE Color Manager can view our Resource Page at http://www.pantone.com/pages/pantone/pantone.aspx?pg=21054&ca=12.
You can also contact Pantone Technical Support directly at firstname.lastname@example.org.
Manager - Technical Support