What is the arrow velocity of a long bow?

This guy's done some research on it. I can't vouch for the accuracy as I don't know the gent. But since there's currently no answer on here I guess this is better than nothing.

He calculated 187 miles per hour.

http://forums.cabelas.com/showthread.php?t=8794

250 feet/ sec converts to 170 mph, 300 feet/second converts to about 205 mph. Those look to be fairly common speeds for a modern compound bow.