I haven't quite completed this, but seeing as the bikes were in the garden and it was a nice day here's my Yeti FRO. Built in around 1988, frame number is 368 if anyone can shed any light. I bought it in 1993 and retired it from active service in 1999 when she was replaced by my (now MadCowKev's) Pro FRO.
Unlike most Yetis, the top tube is round. When I visited the factory I was told they made a few like this when they ran out of oval tubes!
This one will be a single speed (for no reason other than I don't have one yet). It doesn't have any brakes yet as I can't decide which ones to put on (Grafton vs the original XT cantilevers vs Onza H2O)
Frame: Yeti FRO
Stem: RinglÃ© trailstem
Front wheel: Spinergy
Rear wheel: Tioga Disk Drive
(excuse the pedals!)