Issue No. 08 (July 1, 1999)
This is a special edition on conditional formatting. Contents are in a ZIP file that contains an 18-page Word document and a 27-worksheet Excel workbook that provides lots of useful information about conditional formatting for Excel 97 and later.
Excel Expert Newsletter Archives
Here you'll find the archives of David Hager's Excel Expert's E-Letter, produced in 1999-2001. This information is old and unorganized, but it's here because it still contains lots of useful information. The newsletters contains quite a few links. Needless to say, most are no longer valid.
It's interesting to note that some of the key problems back then are still key problems today.