Many of you are aware of my plight of being a really tall guy (6'5") trying to find a bike that fits right, and trying to do it "the right way" which for the time being means waiting and thinking and figuring out more what would be my ideal frame dimensions, before springing for a nice custom in a couple of years. I've got plenty of bikes whose frames are on the small side for me, using long seatposts and stems. Here are the current incarnations of
My red Raleigh, 59cm seattube (ctt), 59cm top tube, with Nitto Technomic stem and 180mm XTR crankarms:

The crazy-80's pink Centurion Ironman, 64cm seattube, 58cm top tube, with 130mm 90-degree stem:

Old Miyata lugged road frame converted into a frankenbike commuter, with 62cm seattube and 56.5cm top tube:
All of these bikes, though large, are still on the small side for me. I compensate by having the handlebars low, since they certainly can't be far enough forward. So my arms go down instead of forward. But then, on eBay tonight, I won
an auction for an old Schwinn, fittingly in Carolina Blue. The auction described the frame as having a 69cm seattube and 64cm top tube! I've never seen anything within 2cm of this on either dimension! Note that this picture is from the eBay auction; I've not seen the bike yet. I wouldn't have the seatpost up so high on a frame so large.
Edit: I just measured the frame (Feb 12; just finished building the bike up into a nice fixie) and the dimensions are 67cm seat tube ctt, and 62cm top tube ctc. Sorry to confuse; I'd just taken the dimensions listed by the seller.
Of course this isn't good enough bike to become my regular sweet long-rides road machine. But it's a serviceable frame, with parts in good shape (seller is upgrading me to aluminum wheels for some extra money), and I'll be able to ride it all around, to my heart's content, and actually have a bike at the upper edge of what I can comfortably ride. Also, everything about this frame is perfect for a future conversion to fixed-gear. But in the meantime, it's going to be helpful for me to test with sizing, and see what dimensions I'm actually able to deal with.