Jeff Id writes:
Buffy Minton who provided the email Mime data has produced a spreadsheet of Climategate 1 and 2 emails in chronological order. This should be an excellent tool to follow conversations through.
Here are the links:
ordered emails – xls (Office 2000, 2003)
ordered emails – xlsx (Office 2007 and later)
Note you can also load these into Open Office and LibreOffice which are both free.