Yes, lissie is right. not only in hub pages but also we should not place more than 1 link of same domain in article submission also.
There are so many good points being made here. Remember that we must build naturally. this of course means different things to different people.
You can post not unique content on HubPages it also works mixed, rewrited and added content. You should pay attention to your personal hubscore. when it becomes 75 your links starts do follow
i have been working on squidoo for sometime and i love it! theres lot to improve..in the next couple of days ill be discovering stuffs