My name is Bryan Bennighof and I've been studying Aikido for about a year and a half under the direction of Michael Black Sensei (
http://www.aikidocenter.com ), a student of Fumio Toyoda Shihan.
For what it's worth, I also study Brazilian Jiu-jitsu with my wife (her for 1.5 years, me for 0.5 years) under BJJ black belt Eric Williams.
Because I study both arts, the discussions I've seen regarding the need for resistance training in Aikido are of particular interest.
Thank you.