I recommend lowering your seat by about 1 cm, and maybe taking one of your spacers and lowering your handle bars.

This is no way to assess fit, but if you post 2 pictures, centered on your seat in riding position, one with your carnks horizontal (closest foot forward) the other with the cranks vertical (closest foot down) we could see whats going on.

Your arms do look like they are extended too far (do you get back pain?), but because of your leg position I cant tell if your seat is too far back (assuming you are centered on it) or if your stem is too long. That being said, there is probably no need to worry. You may need to tweak your fit, but the frame is probably a good size (anybody 6'5" will make their bike look like it has 650 c wheels)

I am absolutely not an expert, but I do not think that bike is too small.

As others have said, get a proper fit done. A fitter can move the seat back & forth on the rails, raise & lower the handlebars and swap out the stem for something shorter or longer to get you to a good position.

Zinn is great, but your hometown of Portland has many really good custom builders (if you ever want to go that route):

http://bikeportland.org/2006/06/23/announcing-the-made-in-portland-bicycle-show/

The guy at Vanilla Bicycles creates works of art.

This biggest things that jump out to me are that you look a little stretched in the arms, and it's hard to tell if I dropped a plumb bob from your knee if it'd hit the crankshaft, or be behind it.

Definately 2nd, 3rd, whatever the professional fit. They'll also know a lot more than most of us here ;)