I'm about 6'3.5" or 6'4". I wear shirts with a 36 or 37" arm.
This is me on my 66cm C-T-T ST / 58cm C-T-C TT beater. 10cm quill stem. Not much drop -- this photo is after an 85 mile day up to a campsite in Massachusetts (not in those shorts). The stem could definitely be longer, but looking at the picture, I guess can see that I compensate with my hand placement way forward.
When in shape, I spend a lot of time in the drops on this bike. It has 38 cm bars from its days as an NYC beater...
On newer bikes with STI's, I am on the hoods with more drop.
EDIT... Zombie thread!