Just did the Barnes and Noble thing described. Haven't seen the points show up in my Mileage Plus account, but ClickRewards quickly showed that the transferred had happened from their end. One caveat, after I signed up at ClickRewards, it took a week for them to send me the welcome email which gave me the ability to access/use my account.
Also, check out the "News" link at
http://www.mileageworkshop.com for an easy way to get more ClickMiles.