Just select the chart, copy it, switch to Word, and use edit > paste
special, and choose the Paste option, as Microsoft Excel Chart Object. Note:
this doesn't just copy the chart, but also the entire workbook. To prevent
bloating of your Word doc, and to prevent sensitive information from being
distributed, copy the chart and paste it into its own sheet in an otherwise
empty workbook. It still links to the data in the original workbook, but
doesn't lug all that baggage around with it.
- Jon