Klein's name for the paint job was "Carribean Linear Fade" - it was the standard offering for that year and model. It wasn't sold as a bare frame and it came with 600/Ultegra group. Obviously been re-built since then with the Bontrager seatpost and blue brakes among other things. Are those Shimano road SPDs? And what's up with that seatpost collar binder bolt? Looks like it belongs inside the brake lever or something.

Edit: It looks like the whole cable housing runs through the top tube - yes? The stock way of doing this was with little insert cable stops which are probably very hard to find now... but if the uncut housing thing works, I've gotta say BRILLIANT!