“T-shaped is highly desired, but not sufficient. In staffing up teams, interview and test for I-shapedness. I don’t care how good someone is either at the pragmatic or abstract level, there is someone out there who is equally good and who has strength at both ends. Find that person.” – Bill Buxton
http://www.businessweek.com/innovate/content/jul2009/id20090713_332802.htm