http://www.nationalfootballpost.com/2009/03/behind-the-measurements-height-vs-arm-length/Here is his chart, the article then lists all the top OT prospects along with their arm lengths
“Great” Arm Length (35-plus inches)
D’Brickashaw Ferguson, Jets: 35½ inches (2006)
Ryan Clady, Broncos: 36 inches (2008)
“Good” Arm Length (34-34 7/8 inches)
Jammal Brown, Saints: 34¼ inches (2005)
Jeff Otah, Panthers: 34 5/8 inches (2008)
“Average” Arm Length (33-33 7/8 inches)
Michael Roos, Titans: 33 5/8 inches (2005)
Levi Brown, Cardinals: 33 1/8 inches (2007)
“Below Average” Arm Length (32-32 7/8 inches)
Robert Gallery, Raiders: 32¼ inches (2004)
Chris Williams Bears: 32¾ inches (2008)