First Linux Install: 1997 - Red Hat 4.2. Dual-boot w/Win 95.

First Serious Use At Work: 1998 - Debian on a 486 w/2 ISA cards to
      replace a $3000 Windows NT firewall

First Time I Removed Windows Completely: 1999 - Tired of BSoD's of
      Win '98

Day I wet back to a commercial OS as my primary desktop... still have't.

Fun times! :)

Chad