I commute to law school on the steel Mexinelli Windsor Profesional (sp) that my dad bought in ~1974. It has fenders so I also use it as my rain bike.
Did the STP last year on my dad's steel Tommasini he bought in 1991.
Finally test rode some new CF bikes Friday and, even though they don't have the classic style of a handmade Italian steel frame, I still have new bike lust.