o.k., here's mine:

1990 Trek 930 Singletrack
still 7-speed SunTour X-1 drivetrain - only replaced one gear on the rear freewheel over the life of the bike. both larger chainrings have been replaced multiple times, though.
rear brakes are still original (except for pads, of course).
fork is kinda cheap - RST Omega T4. 1" forks are hard to find, and i kinda wished i'd ponied up the extra dough for a Marzocchi, but i hadn't been planning on replacing my fork last year at all.
front brake is a Hayes HFX9 XC.
couldn't tell you what the seatpost is - only one i've had for more than a year without breaking, and it's been on the bike for about eight years.
Selle Italia Flite Gel saddle - replaced my (very old) Selle Italia Turbo Gel last year. still getting used to the cut-away shape.
handlebars are Scott AT-4. the bridge isn't available anymore, but a Profile bridge can be modified to fit, and that's what i'm using now.
pedals are Shimano PD-M525 - almost as old as the bike. i rode with clips and straps until 92, then bought these. heavy? hell yes. but durable!

i've rode this bike off and on for almost fifteen years, in four countries, six states and two hemispheres. it's been everything from a all-road tourer to an XC fun machine.

i will never get rid of this bike.