If you have Word, you can use one of the Word templates listed at http://www.slipstick.com/addins/calendar.htm#print to push the Outlook data into a Word document, then attach that document to a message.
Another technique is to use a third-part tool called ClipForm (http://www.ivitar.com/clipform/). This tool uses templates to export Outlook data -- a whole folder or selected items -- to the Windows clipboard, text file, HTML email message, or other file types.